1. train-of-four - Noun
2. train-of-four - Adjective
train-of-four (not comparable)
(medicine) Relating to a monitoring protocol for neuromuscular blockade, where the muscle response to four consecutive stimuli delivered along the path of a nerve is measured to determine the level of blockade.
train-of-four stimulation
train-of-four (plural train-of-fours)
(medicine, informal) The neuromuscular blockade monitoring method described above.