vocal cords
Definition - Also called the vocal folds, these are the flaps in the larynx that rapidly open and close when we speak. When doing this, they emit the puffs of air that produce the vibrating noise we call the voice.

The vocal folds/cords
The vocal folds/cords

Oxford English Dictionary -
The term's first citation is from 1872:
"These sharp free edges of the glottis are the so-called vocal chords or vocal ligaments."
(Huxley Physiol. vii. 178)

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