The Collaborative International Dictionary of English v.0.48:
Basidiospore \Ba*sid"i*o*spore\, n. [Basidium + spore.] (Bot.) A spore borne by a basidium. -- Ba*sid`i*o*spor"ous, a. [1913 Webster]WordNet (r) 3.0 (2006):
basidiospore n 1: a sexually produced fungal spore borne on a basidium