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The Collaborative International Dictionary
Gonoblastidium

Gonoblastidium \Gon`o*blas*tid"i*um\, n.; pl. Gonoblastidia. [NL., fr. Gr. ? offspring + ? to bud.] (Zo["o]l.) A blastostyle.

Wiktionary
gonoblastidium

n. A blastostyle.