electroglottograph


Also found in: Acronyms.

elec·tro·glot·to·graph

(ĕ-lek'trō-glot'ō-graf)
An instument that measures the impedance between two electrodes placed externally on either side of the larynx. The impedance is reduced whenever the vocal folds come in contact, thus creating a record of the cycles of glottal opening and closure.