• Webster's Revised Unabridged Dictionary
    • n Nauplius (Zoöl) A crustacean larva having three pairs of locomotive organs (corresponding to the antennules, antennæ, and mandibles), a median eye, and little or no segmentation of the body.
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Century Dictionary and Cyclopedia
    • n nauplius A spurious genus of crustaceans named by O. F. Müller in 1785.
    • n nauplius A stage of development of low crustaceans, as cirripeds and entomostracans, in which the larva has three pairs of legs, a single median eye, and an unsegmented body. Many crustaceans hatch as nauplii. See cuts under Cirripedia.
    • ***
Chambers's Twentieth Century Dictionary
    • n Nauplius naw′pli-us a stage of development of low Crustaceans, as cirripeds, &c.
    • ***


Webster's Revised Unabridged Dictionary
L., a kind of shellfish, fr. Gr. nay^s ship + to sail
Chambers's Twentieth Century Dictionary
L., a kind of shell-fish—Gr. Nauplios, a son of Poseidon, naus, a ship, plein, to sail.


In literature:

And after him Erginus and Nauplius and Euphemus started up, eager to steer.
"The Argonautica" by Apollonius Rhodius
This form of the common fresh-water CYCLOPS was described as a distinct genus under the name of NAUPLIUS.
"On the Origin of Species" by Charles Darwin
Then they set sail again, and Nauplius was made the steersman of the ship.
"The Golden Fleece and the Heroes who Lived Before Achilles" by Padraic Colum
Not able to bear any longer such melancholy spectacles, we took our leave of Nauplius, and returned to our ship.
"Trips to the Moon" by Lucian
A different name even is given to it by the biologist, who knows it at this period as a Nauplius.
"Natural Law in the Spiritual World" by Henry Drummond
The development begins with a free nauplius stage.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6" by Various
Larva of Prawn, Nauplius stage.
"On the Origin and Metamorphoses of Insects" by Sir John Lubbock
As development proceeds, the body of the nauplius elongates, and indications of segmentation begin to appear in its posterior part.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7" by Various
The parthenogenetic eggs, as in other Cladocera, develop directly, but the resting eggs give rise to larvae of the nauplius type.
"The Life of Crustacea" by William Thomas Calman
Archicarida Nauplius Gill-footed Crabs { 2.
"The History of Creation, Vol. II (of 2)" by Ernst Haeckel