Con*cep"ta*cle (?), n. [L. conceptaculum, fr. concipere to receive. See Conceive.] 1. That in which anything is contained; a vessel; a receiver or receptacle. [Obs.] Woodward.

2. (Bot.) (a) A pericarp, opening longitudinally on one side and having the seeds loose in it; a follicle; a double follicle or pair of follicles. (b) One of the cases containing the spores, etc., of flowerless plants, especially of algae.