ceras

ceras
n.; pl. cerata [Gr. keras, horn]
1. A horn or horn-like appendage.
2. (MOLLUSCA: Gastropoda)
In some Nudibranchia, numerous projections that act as gills on the dorsal body surface, may be club shaped or grapelike and usually brilliantly colored in red, yellow, orange, blue, green, or a combination of colors; functioning in respiration, containing blood from the hemocoel and tubular branches of the digestive gland.

Online Dictionary of Invertebrate Zoology. . 2005.

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