ACCORDION
ACCORDION:
ADA
A simultaneous incrementing of evolution and mixing times. - 2D ADA:
ADRF
Alternated Delay AcquisitionADRF:
AHT
Adiabatic Demagnetization in the Rotating FrameAHT:
APHH-CP
Average-Hamiltonian TheoryAPHH-CP:
APT
Adiabatic-Passage Hartmann-Hahn Cross PolarizationAPT:
ARP
Attached Proton TestARP:
ASIS
Adiabatic Rapid PassageASIS:
Aromatic Solvent-Induced Shift |

BB
BB:
BIRD
BroadbandBIRD:
BLEW
Bilinear Rotation DecouplingBLEW:
BR-24
A windowless multiple-pulse decoupling sequence BR-24:
Burum and Rhim pulse sequence |

CAMELSPIN
CAMELSPIN:
CHESS
Cross-relaxation Appropriate for Minimolecules Emulated by Locked SPINsCHESS:
CHIRP
Chemical Shift Selective Imaging SequenceCHIRP:
CIDNP
a quick, frequency modulated 'chirp' pulse used for broadband decoupling CIDNP:
COCONOESY
Chemically Induced Dynamic Nuclear PolarizationCOCONOESY:
COLOC
Combined COSY/NOESYCOLOC:
CONOESY
Correlatied Spectroscopy for Long Range CouplingCONOESY:
COSY
Combined COSY/NOESYsame thing as COCONOESY COSY:
COSY-45
Correlation SpectroscopyScalar J coupling - usually 2D COSY-45:
COSYDEC
COSY with 45° mixing pulseCOSYDEC:
COSYLR
COSY with F1 DecouplingCOSYLR:
CP
COSY for Long Range CouplingsCP:
CPD
Cross PolarizationCPD:
CPMAS
Composite-Pulse DecouplingCPMAS:
CPMG
Cross Polarization Magic-Angle SpinningCPMG:
CRAMPS
Carr-Purcell-Meiboom Gill SequenceCRAMPS:
CRINEPT
Combined Rotational and Multiple Pulse SpectroscopyCRINEPT:
CSA
Cross-correlated Relaxation-enhanced PolarizationA combination of INEPT with cross-correlated relaxation-induced polarization transfer CSA:
CSCM
Chemical Shift AnisotropyCSCM:
CT
Chemical Shift Correlation MapCT:
CT-HSQC
Constant TimeCT-HSQC:
CW
Constant Time - Heteronuclear Single Quantum CorrelationScalar J coupling - usually 2D CW:
CYCLOPS
Continuous WaveScalar J coupling - usually 2D CYCLOPS:
Cyclically Ordered Phase SequenceScalar J coupling - usually 2D |

DANTE
DANTE:
DAS
Delay Alternating with Nutation for Tailored ExcitationDAS:
DCNMR
Dynamic Angle SpinningDCNMR:
DD
Direct Current NMRNMR performed in the presence of a direct electric current DD:
DECSY
Dipole-DipoleDECSY:
DEFT
Double-quantum Echo Correlated SpectroscopyDEFT:
DENA
Driven Equilibrium Fourier TransformDENA:
DEPT
Dfferential Evolution for Non-ambiguous AliasingA fast method for increasing the resolution of a 1H-13C HSQC in the indirect dimension. Ref: M. Foroozandeh D. Jeannerat \“Deciphered Chemical Shifts in Aliased Spectra recorded with two Slightly Different Narrow Windows or Differential Chemical Shift Evolution\” ChemPhysChem 2010, 11, 2503-2505DEPT:
DEPTH
Distortionless Enhanced Polarization TransferDEPTH:
DIGGER
A spin-echo sequence of pulses to select for spatial location within the static field DIGGER:
DIPSI
Discrete Isolation from Gradient Governed Elimination of ResonancesDIPSI:
DISCO
Decoupling In the Presence of Scalar InteractionsDISCO:
DNMR
Difference and Sums within COSYDNMR:
DOUBTFUL
Dynamic NMRDOUBTFUL:
DQ
Double Quantum Transitions for Finding Unresolved LinesDQ:
DQC
Double QuantumDQC:
DQF
Double Quantum CoherenceDQF:
DQF-COSY
Double Quantum FilterDQF-COSY:
DRAMA
Double Quantum Filtered - Correlation SpectroscopyDRAMA:
DRESS
Dipolar Recovery at the Magic AngleA solid-state NMR recoupling technique. DRESS:
DSA
Depth Resolved SpectroscopyDSA:
DUMBO
Data-Shift AcquisitionDUMBO:
a numerically optimized sequence (see Homonuclear dipolar decoupling in solid-state NMR using continuous phase modulation) |

E.COSY
E.COSY:
EFG
Exclusive Correlation SpectroscopyEFG:
ELD
Electric Field GradientELD:
ENDOR
Energy Level DiagramENDOR:
ENMR
Electron-nuclear Double ResonanceENMR:
EPI
Electrophonetic NMREPI:
ESR
Echo Planar ImagingESR:
EXORCYCLE
Electron Spin ResonanceEXORCYCLE:
4-step phase cycle for spin echoes |

FFT
FFT:
FID
Fast Fourier TransformFID:
FIRFT
Free Induction DecayFIRFT:
FLASH
Fast Inversion-Recovery Fourier TransformFLASH:
FLOPSY
Fast Low-angle Shot ImagingFLOPSY:
FOCSY
Flip-Flop SpectroscopyA decoupling scheme FOCSY:
FOV
Foldover-Corrected SpectroscopyA decoupling scheme FOV:
FSLG
Field of ViewFSLG:
FT
Frequency Switched Lee-Goldburga decoupling scheme - (see Homonuclear dipolar decoupling in solid-state NMR using continuous phase modulation) FT:
FUCOUP
Fourier TransformFUCOUP:
Fully Coupled Spectroscopy |

GARP
GARP:
GE
Globally Optimized Alternating Phase Rectangular PulseA decoupling scheme GE:
GES
Gradient EchoGES:
GRASP
Gradient Echo SpectroscopyGRASP:
GRASS
Gradient-Accelerated SpectroscopyGRASS:
GROPE
Gradient-Recalled Acquisition the Steady StateGROPE:
GS
Generalized compensation for Resonance Offset and Pulse Length ErrorsGS:
Gradient Spectroscopy |

H, C-COSY
H, C-COSY:
HETCOR
1 H, 13C Chemical-Shift Correlation SpectroscopyHETCOR:
HMBC
Heteronuclear Correlation SpectroscopyHMBC:
HMQC
Heteronuclear Multiple Bond CoherenceHMQC:
HOESY
Heteronuclear Multiple Quantum CoherenceHOESY:
HOHAHA
Heteronuclear Overhauser Effect SpectroscopyHOHAHA:
HR
Homonuclear Hartmann-Hahn SpectroscopyHR:
HSQC
High ResolutionHSQC:
H, X-COSY
Heteronuclear Single Quantum Correlationxxx H, X-COSY:
1 H, X-nucleus chemical-shift Correlation Spectroscopy |

INADEQUATE
INADEQUATE:
INDOR
Incredible Natural Abundance Double Quantum Transfer ExperimentINDOR:
INEPT
Internuclear Double ResonanceINEPT:
INVERSE
Insensitive Nuclei Enhanced by PolarizationINVERSE:
IPAP
H, X correlation via 1H detection IPAP:
IR
Inphase Antiphase (HSQC)IR:
ISIS
Inversion-RecoveryISIS:
Image-Selected In Vivo Spectroscopy |

JR
JR:
Jump - and - Return sequence90 _{y} - tau - 90_{-y} |

LIS
LIS:
LP
Lanthanid Induced ShiftLP:
LSR
Linear PredictionLSR:
Lanthanide Shift Reagent |

MARF
MARF:
MAS
Magic Angle in the Rotating FrameMAS:
MASS
Magic Angle SpinningMASS:
MEDUSA
Magic Angle Sample SpinningMEDUSA:
MEM
A technique for the determination of Dynamic Structures MEM:
MLEV
Maximum Entropy MethodMLEV:
MP
Malcolm Levitt's CPD sequenceA decoupling scheme MP:
MQ
Multi PulseMQ:
MQC
Multiple-QuantumMQC:
MQF
Multiple-Quantum CoherenceMQF:
MQS
Multiple-Quantum FilterMQS:
MREV
Multiple-Quantum SpectroscopyMREV:
MRI
Mansfield-Rhim-Elleman-Vaughn sequence for dipolar line narrowingMRI:
MRS
Magnetic Resonance ImagingMRS:
MRSI
Magnetic Resonance SpectroscopyMRSI:
MSHOT-3
Magnetic Resonance Spectroscopic ImagingMSHOT-3:
MSPGSE
Magic Sandwich High Order Truncationa method based on z-rotational decoupling N. C. Nielsen and co-workers, J. Chem. Phys. 106, 7571(1997); Chem. Phys. Lett. 273, 297 (1997) MSPGSE:
Multiply-Stepped PGSE |

NMR
NMR:
NOE
Nuclear Magnetic ResonanceNOE:
NOESY
Nuclear Overhauser EffectNOESY:
NQCC
Nuclear Overhauser Effect SpectroscopyInternuclear cross relaxation - usually 2D NQCC:
NQR
Nuclear Quadrupole Coupling ConstantNQR:
Nuclear Quadrupole Resonance |

ODMR
ODMR:
OSIRIS
Optically Detected Magnetic ResonanceOSIRIS:
a modified version of ISIS |

PAR
PAR:
P.E.COSY
Phase-alternated Rotation of MagnetizationP.E.COSY:
PELF
Primitive E.COSYPELF:
PFG
Proton-Encoded Local Field spectroscopya 2D method PFG:
PFGSE
Pulse Field GradientPFGSE:
PGSE
Pulse Field Gradient Spin EchoPGSE:
PMFG
Pulsed Gradient Spin EchoPMFG:
POST
Pulsed Magnetic Field GradientPOST:
ppm
Permutationally Offset Stabilizedppm:
PRESS
parts per millionThe prefered way of describing chemical shift offsets. (e.g a 100 Hz shift in a 100 MHz field is 1 ppm) PRESS:
PRFT
Point Resolved SpectroscopyPRFT:
PSD
Partially Relaxed Fourier TransformPSD:
PW
Phase-Sensitive DetectionPW:
Pulse Width |

QF
QF:
QPD
Quantum Moment/Field Gradientinteraction or relaxation mechanism QPD:
Quadrature Phase Detection |

RARE
RARE:
RCT
Rapid Acquisition Relaxation EnhancedRCT:
RD
Relayed Coherence TransferRD:
RECSY
Reduced DimensionalityRECSY:
REDOR
Multistep Relayed Coherence SpectroscopyREDOR:
RELAY
Rotational Echo Double ResonaceRELAY:
RF
Relayed Correlation SpectroscopyRF:
ROESY
Radio FrequencyROESY:
ROTO
Rotational nuclear Overhauser Effect SpectroscopyROTO:
ROESY-TOCSY Relay |

SA
SA:
SC
Shielding AnisotropySC:
SD
Scalar CouplingSD:
SDDS
Spin DiffusionSDDS:
SE
Spin Decopling Difference SpectroscopySE:
SECSY
Spin EchoSECSY:
SEDOR
Spin Echo Correlated SpectroscopySEDOR:
SEFT
Spin Echo Double ResonaceSEFT:
SELINCOR
Spin Echo Fourier Transform Spectroscopywith J modulation SELINCOR:
SELINQUATE
Selective Inverse CorrelationSELINQUATE:
SEMUT
Selective INADEQUATESEMUT:
SFORD
Subspectral Editing Using a Multiple-Quantum TrapSFORD:
SKEWSY
Single Frequency Off-Resonance DecouplingSKEWSY:
SNR (S/N)
Skewed Exchange SpectroscopySNR (S/N):
SPACE
Signal to Noise RatioSPACE:
SPECIFIC-CP
Spatial and Chemical-Shift Encoded ExcitationSPECIFIC-CP:
SPI
Spectrally Induced Filtering In Combination with Cross PolarizationSPI:
SPT
Selective Population InversionSPT:
SQ
Selective Population TransferSQ:
SQF
Single QuantumSQF:
SR
Single Quantum FilterSR:
SSFP
Saturation RecoverySSFP:
SSI
Steady-State Free PrecisionSSI:
ssNMR
Solid State ImagingssNMR:
STE
Solid State NMRSTE:
STEAM
Stimulated EchoSTEAM:
STUD
Stimulated Echo Acquisition Mode for imageingSTUD:
SUSAN
Adiabatic decoupling method M.R. Bendall and T.E. Skinner. \Calibration of STUD decoupling to achieve selected sideband amplitudes.\ J. Magn. Reson., A120, 77-87 (1996). SUSAN:
Spin Decoupling Employing Ultra-broadband-inversion Sequences Generated via Simulated Annealing |

TCF
TCF:
TE
Time Correlation FunctionTE:
TMR
Time delay between excitation and Echo maximumTMR:
TOCSY
Topical Magnetic ResonanceTOCSY:
TOE
Total Correlated SpectroscopyTOE:
TORO
Truncated NOETORO:
TOSS
TOCSY-ROESY RelayTOSS:
TPPI
Total Supression of SidebandsTPPI:
TPPM
Time-Proportional Phase IncrementationTPPM:
TQ
Two Pulse Phase ModulationTQ:
TQF
Triple QuantumTQF:
TR
Triple Quantum FilterTR:
TRCF
Time for Repitition of excitationTRCF:
TROSY
Tilted Rotating Coordinate FrameTROSY:
Transverse Relaxation-Optimized NMR Spectroscopy |

UE
UE:
Unpaired ElectronA relaxation mechanism |

VAS
VAS:
VOSY
Variable Angle SpinningVOSY:
Volume-Selective Spectroscopy |

WAHUHA
WAHUHA:
WALTZ
Waugh-Huber-Haberlen SequenceWALTZ:
WATERGATE
A broad-band composite pulse decoupling scheme WATERGATE:
WEFT
Water Supression Pulse Sequence WEFT:
WURST
Water Eliminated Fourier TransformWURST:
Wideband, Uniform Rate, and Smooth Truncationan adiabatic decoupling method Kupce, E., Freeman, R. Adiabatic pulses for wideband inversion and broadband decoupling A 115 273-276. J. Magn. Reson. |

XCORFE
XCORFE:
X-Filter
H, X Correlation Using a Fixed Evolution TimeX-Filter:
X-Half-Filter
Selection of 1H - 1H correlations when both protons are coupled to X X-Half-Filter:
Selection of 1H - 1H correlations when one proton is coupled to X |

Z-COSY
Z-COSY:
ZECSY
COSY with Z-filter ZECSY:
Z-Filter
Zero-Quantum Echo-Correlated SpectroscopyZ-Filter:
ZQ
pulse sandwich for elimination of signal components with dispersive phase ZQ:
ZQC
Zero QuantumZQC:
ZQF
Zero Quantum CoherenceZQF:
ZZ-Spectroscopy
Zero Quantum FilterZZ-Spectroscopy:
Selection of coherences invloving ZZ or longitudinal two-spin order |

The definitions for many of these were obtained from
*Concepts in Magnetic Resonance, Vol. 10*
59-62 (1998) © 1998 John Wiley & Sons, Inc.

Other definitions have come from various NMR literature sources. If you have an acronym that describes an actual NMR experiment, please let us know. Give us the acronym, its expansion, and if possible, a brief description of what it would be used for and a primary journal citation.