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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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(nÿ -ad) A small satellite of Neptune, discovered in 1989. See Table 2, backmatter.



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.


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).


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)
References in periodicals archive ?
Naiad equips its electric fin stabilizer with several vital safety features, including the capability to center the fins physically and lock in place during the rest period of the stabilizer.
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.
No more pickets were planned as of Thursday, Naiad said.
After hatching, each naiad was placed in a separate petri dish, where the exuviae were collected after each molt.
Two Australian sailors were killed when their 40-foot boat, Business Post Naiad, capsized 60 miles off Merimbula, in New South Wales.
But since its first printing in 1980, the book has been one of Naiad Press's top sellers.
This unconventional business plan makes perfect sense, given the boat's unique design, says Alan Shaw, the man behind Naiad Inflatables USA.
Prior to that, he was President and CEO of Naiad Technologies, Inc.
It also had a small pond and one of the city's best known statues, the Naiad, or nymph, whose legs dangled in the water there for half a century.
Louis, the recreation center of the Naiad Club Nautical Navy, the arts and sports club of the Mediterranean (CSAM) The Farlede.
Although Naiad Du Misselot's last success came over hurdles at the 2008 Cheltenham Festival, he retains plenty of ability and was going well when falling four out at Duncombe Park six days ago.
Naiad Du Misselot should not be too far away, either, when he competes at Kelso in the Peter K Dale Novices' Handicap Chase.