Source : Webster's Revised Unabridged Dictionary (1913)

Conidium \Co*nid"i*um\, n.; pl. {Conida}. [NL.] (Bot.)
   A peculiar kind of reproductive cell found in certain fungi,
   and often containing zo["o]spores.

Source : WordNet®

conidium
     n : an asexually produced fungal spore formed on a conidiophore
         [syn: {conidiospore}]
     [also: {conidia} (pl)]