from The Century Dictionary.

  • noun In Ascidia, the pouch in which incubation takes place; a diverticulum of the wall of the atrium, which projects into the atrial cavity, and into which is received the ovarian follicle containing an impregnated ovum.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Zoöl.) The pouch in which incubation takes place in some Tunicata.


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