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n. pl. nau·pli·i (-plē-ī′)
The free-swimming first stage of the larva of certain crustaceans, having an unsegmented body with three pairs of appendages and a single median eye.
[New Latin, from Nauplius, former genus of crustacean (later discovered to be a larval stage of other genera), from Latin nauplius, paper nautilus, from Greek nauplios, nautilus (probably the pearly nautilus of the Indian Ocean) : naus, nau-, ship; see nāu- in the Appendix of Indo-European roots + plein, to sail, float, swim (the animal being so called because it was thought to sail in its shell like a ship and use its arms as oars); see pleu- in the Appendix of Indo-European roots.]
nau′pli·al (-əl) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
n, pl -plii (-plɪˌaɪ)
(Zoology) the larva of many crustaceans, having a rounded unsegmented body with three pairs of limbs
[C19: from Latin: type of shellfish, from Greek Nauplios, one of the sons of Poseidon]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
nau•pli•us(ˈnɔ pli əs)
n., pl. -pli•i (-pliˌaɪ)
a larval form in many crustaceans, with three pairs of appendages and a single median eye.
[1830–40; < Latin: a kind of shellfish]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.