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 (nā′tə-tôr′ē-əl, năt′ə-) also na·ta·to·ry (nā′tə-tôr′ē, năt′ə-)
Of, relating to, adapted for, or characterized by swimming: a natatorial appendage; natatorial birds.

[From Late Latin natātōrius, from Latin natātor, swimmer, from natātus, past participle of natāre, frequentative of nāre, to swim; see snā- in Indo-European roots.]
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.


(nəˈteɪtərɪ) or


of or relating to swimming
[C18: from Late Latin natātōrius, from natāre to swim]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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References in classic literature ?
In the second stage, answering to the chrysalis stage of butterflies, they have six pairs of beautifully constructed natatory legs, a pair of magnificent compound eyes, and extremely complex antennae; but they have a closed and imperfect mouth, and cannot feed: their function at this stage is, to search by their well-developed organs of sense, and to reach by their active powers of swimming, a proper place on which to become attached and to undergo their final metamorphosis.
(1986), suggested that the movements of the prezoea were accomplished with natatory impulses produced with the antennae "whose embryonic cuticle looks like feathers or plumodenticulate setae."
Long natatory setae emerge from the proximal region of the upper notopodial and lower neuropodial lobes beginning on setiger twenty seven.
Third instars of these taxa are separated by the presence of natatory (swimming) sensilla on tibiae and tarsi of Neoporus and their absence on Heterosternuta (Alarie 1991).
The long antennular aesthetascs and the long plumose natatory setae of the first and second maxillipeds have been drawn truncated.
Natatory Setae of antenna II not very long but reach the tip of terminal portion.
Hindfeet without natatory fringes-- continuous combs of stiff hairs along the plantar margins and sometimes between the digits (Fig.
These larvae appeared to have been hatched prematurely, and their morphology differed from that expected for a first-stage zoea form in that maxillipeds were devoid of natatory setae (see Morphology section above).