atrial cornua
(ANNELIDA: Hirudinoidea)
Horns or hornlike prolongations of the atrium.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • atrium — n.; pl. atria [L. atrium, vestibule] 1. A cavity, division, entrance or passageway of various invertebrates. 2. (ANNELIDA) a. A diverticulum of the spermatheca; a tubular or capsular prostate. b. Male reproductive organ in leeches, consisting of… …   Dictionary of invertebrate zoology

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