Source : Webster's Revised Unabridged Dictionary (1913)

Apneumona \Ap*neu"mo*na\, n. pl. [NL., fr. Gr. 'a priv. + ?, ?,
   a lung.] (Zo["o]l.)
   An order of holothurians in which the internal respiratory
   organs are wanting; -- called also {Apoda} or {Apodes}.