1) Spore 
A basidiospore is a reproductive spore produced by Basidiomycete fungi. Basidiospores typically each contain one haploid nucleus that is the product of meiosis, and they are produced by specialized fungal cells called basidia. In gills under a cap of one common species in the phylum of Basidiomycota, there exist millions of basidia. Mature state o...
An exogenous sexual spore (meiospore) borne on a basidium. 
• (n.) A spore borne by a basidium.
Spores of Basidiomycete fungi. These spores are usually uninucleate and haploid. ... (18 Nov 1997) ... 
(bә-sid´e-o-spor) a type of sexual spore of certain higher fungi.
Spores of Basidiomycete fungi. These spores are usually uninucleate and haploid.
Ba·sid'i·o·spore noun [ Basidium + spore .] (Botany) A spore borne by a basidium. -- 
Spore formed after sexual recombination has occurred.
Type: Term Pronunciation: ba-sid′ē-ō-spōr Definitions: 1. A fungal spore borne on a basidium, characteristic of the class Basidiomycetes.
[n] - a sexually produced fungal spore borne on a basidium
noun a sexually produced fungal spore borne on a basidium