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nauplius Syllabification: nau·pli·us
Pronunciation: /ˈnôplēəs/

Definition of nauplius in English:

noun (plural nauplii-plēˌī)

The first larval stage of many crustaceans, having an unsegmented body and a single eye.
Example sentences
  • Some crustaceans hatch young that are like miniature adults; others go through a larval stage called a nauplius.
  • The shape of the body differs considerably between nauplii and copepodids.
  • Most metamorphosing malacostracans have a nauplius larva, but in many species eggs hatch into zoea larvae.


Mid 19th century: from Latin, denoting a kind of shellfish, or from the Greek name Nauplios, the son of Poseidon.

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