D defs.my
Entry 2 senses Webster, 1913

Apothem

/ăpə-thĕm′/ · Ap·o·them · IPA /ˈæp.ə.θɛm/
01 n. The perpendicular from the center to one of the sides of a regular polygon.
  1. 1.
    The perpendicular from the center to one of the sides of a regular polygon.(Math.)
  2. 2.
    A deposit formed in a liquid extract of a vegetable substance by exposure to the air.