apothem

/ˈæp.ə.θɛm/

ÆP · ə · θɛm (3 syllables)

English Noun

Definition

The perpendicular distance from the center of a circle to a chord of the same circle.

Etymology

From Ancient Greek ἀπόθεμα (apóthema, “deposit”), from ἀπό (apó, “off, away”) + θέμα (théma, “that which is laid down”).