1610s, from gesture (n.) + -al (1). Related: Gesturally.
Entries linking to gestural
gesture n.
early 15c., "manner of carrying the body," from Medieval Latin gestura "bearing, behavior, mode of action," from Latin gestus "gesture, carriage, posture" (see gest). Restricted sense of "a movement of the body or a part of it, intended to express a thought or feeling," is from 1550s; figurative sense of "action undertaken in good will to express feeling" is from 1916.
-al 1
suffix forming adjectives from nouns or other adjectives, "of, like, related to, pertaining to," Middle English -al, -el, from French or directly from Latin -alis (see -al (2)).