Aposteme \Ap"os*teme\, n. [L. apostema, Gr. ? the separation of
corrupt matter into an ulcer, fr. ? to stand off: cf. F.
apost[`e]me. See {Apostasy}.] (Med.)
An abscess; a swelling filled with purulent matter. [Written
corruptly {imposthume}.]
[1913 Webster]