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The Collaborative International Dictionary
Endostome

Endostome \En"do*stome\, n. [See Endostoma.]

  1. (Bot.) The foramen or passage through the inner integument of an ovule.

  2. (Zo["o]l.) And endostoma.

Wiktionary
endostome

n. 1 (context botany English) The foramen or passage through the inner integument of an ovule. 2 (context zoology English) An endostoma.