Source : Webster's Revised Unabridged Dictionary (1913)

Basidiospore \Ba*sid"i*o*spore\, n. [Basidium + spore.] (Bot.)
   A spore borne by a basidium. -- {Ba*sid`i*o*spor"ous}, a.

Source : WordNet®

basidiospore
     n : a sexually produced fungal spore borne on a basidium