Definition of ostracod
: any of a subclass (Ostracoda) of very small aquatic crustaceans that have the body enclosed in a bivalve carapace, the body segmentation obscured, the abdomen rudimentary, and only seven pairs of appendages
Recent Examples of ostracod from the Web
Modern ostracods today are similarly well-endowed and some produce absolutely humongous sperm, ten times the size of the male himself.
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Origin and Etymology of ostracod
ultimately from Greek ostrakon
First Known Use: 1865See Words from the same year
Learn More about ostracod
Britannica.com: Encyclopedia article about ostracod
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