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in zoology: see insectinsect,
invertebrate animal of the class Insecta of the phylum Arthropoda. Like other arthropods, an insect has a hard outer covering, or exoskeleton, a segmented body, and jointed legs. Adult insects typically have wings and are the only flying invertebrates.
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in astronomy, one of the natural satellites, or moons, of NeptuneNeptune,
in astronomy, 8th planet from the sun at a mean distance of about 2.8 billion mi (4.5 billion km) with an orbit lying between those of Uranus and the dwarf planet Pluto; its period of revolution is about 165 years.
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The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved.


(nÿ -ad) A small satellite of Neptune, discovered in 1989. See Table 2, backmatter.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a stage in the development of some insects (stoneflies, mayflies, and dragonflies). Naiads are aquatic forms. The analogous stage in the development of other arthropods is the nymph.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


A satellite of Neptune orbiting at a mean distance of 30,000 miles (48,000 kilometers) with a period of 7.1 hours, and a diameter of about 34 miles (54 kilometers).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


1. Greek myth a nymph dwelling in a lake, river, spring, or fountain
2. the aquatic larva of the dragonfly, mayfly, and related insects
3. any of certain freshwater mussels of the genus Unio
4. any monocotyledonous submerged aquatic plant of the genus Naias (or Najas), having narrow leaves and small flowers: family Naiadaceae (or Najadaceae)
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Behavioural adaptation of naiads observed during acclimatization in the laboratory shows that the higher classes (body length ranging from 1.8 cm-2.1 cm) effectively attacked and killed those less than 1.5 cm body length by grabbing them at the thoracic (neck) region with their well developed labial mouth-parts under an hour of co-habitation in glass jars.
Taxonomic studies on Odonata naiads are badly ignored in Pakistan.
When Grier and McBride retired in 2003, they sold Naiad to Bella Books.
Aquatic insects, their naiads and larvae were investigated from Chiliya Bund during 2006-2007.
Soon after the boat was righted, skipper Bruce Guy suffered a massive heart attack as he and crewmember Steve Walker tried to manoeuvre the yacht's liferafts from below, where there was dose to three feet of water inside and Naiad was in danger of foundering.
Interesting that Murphy runs him in first time blinkers, expect a big run as Naiad has very few miles on the clock and there could be plenty to come.
No more pickets were planned as of Thursday, Naiad said.
For example, if a naiad hatched from the egg in June, it would emerge as an adult the following June; if the naiad hatched in August it would emerge as an adult the following August.
Cyrene In Greek mythology, a nymph, daughter of Hypseus (king of the Lapiths) and Chlidanope (a Naiad).
This unconventional business plan makes perfect sense, given the boat's unique design, says Alan Shaw, the man behind Naiad Inflatables USA.
The Naiad statue used to be homed in Earl Street courtyard, but was removed because the council wanted to find a safer place to put it.