larva


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.

larva

 [lahr´vah] (pl. lar´vae) (L.)
1. an independent, immature stage in the life cycle of an animal, in which it is markedly unlike the parent and must undergo changes in form and size to reach the adult stage.
2. something that resembles such an immature animal.
larva cur´rens a rapidly progressive creeping eruption caused by autoinoculation of larvae of Strongyloides stercoralis that migrate to and mature at the anus in intestinal infections with the parasite.
cutaneous larva mi´grans (larva mi´grans) a convoluted threadlike skin eruption that appears to migrate, caused by the burrowing beneath the skin of roundworm larvae, particularly of the species Ancylostoma; similar lesions are caused by the larvae of botflies. Called also creeping eruption.
ocular larva migrans infection of the eye with larvae of the roundworm Toxocara canis or T. cati, which may lodge in the choroid or retina or migrate to the vitreous; on the death of the larvae, a granulomatous inflammation occurs, the lesion varying from a translucent elevation of the retina to massive retinal detachment and pseudoglioma.
visceral larva migrans a condition due to prolonged migration by the skin larvae of animal nematodes in human tissue other than skin; commonly caused by larvae of the roundworms Toxocara canis and T. cati.

lar·va

, pl.

lar·vae

(lar'vă, lar'vē),
1. The wormlike developmental stage or stages of an insect or helminth that are markedly different from the adult and undergo subsequent metamorphosis; a grub, maggot, or caterpillar.
2. The second stage in the life cycle of a tick; the stage that hatches from the egg and, following engorgement, molts into the nymph.
3. The young of fishes or amphibians that often differ in appearance from the adult.
[L. a mask]

larva

(lär′və)
n. pl. lar·vae (-vē) or lar·vas
1.
a. The newly hatched, wingless, often wormlike form of many insects, developing into a pupa in species that undergo complete metamorphosis.
b. The six-legged immature form of a tick or mite.
2. The newly hatched, earliest form of any of various animals that undergo metamorphosis, differing markedly in appearance from the adult.

lar′val adj.

lar·va

, pl. larvae (lahr'vă, -vē)
1. Developmental stage or stages of an insect or helminth.
2. The second stage in the life cycle of a tick; the stage in which it hatches from the egg and, following engorgement, molts into the nymph.
3. The young of fishes or amphibians that often differ in appearance from the adult.
[L. a mask]

larva

(pl. larvae) the preadult form of many animals that is usually morphologically different from the adult, and which in many cases takes up the larger part of the life history. Usually the larva is not sexually mature, but in cases of PAEDOGENESIS, of which the AXOLOTL is an example, breeding may take place at this stage. Often the larva is a dispersal phase, as in many marine invertebrates where larvae occur in the PLANKTON and usually the larva feeds in a different way from the adult and does not compete with it.

Larva

The immature, early form of an organism that at birth or hatching is not like its parent and has to undergo metamorphosis before assuming adult features.
References in periodicals archive ?
Total swimming speeds do not necessarily indicate the capacity of larvae to control their position; the vertical component of swimming speed better represents the ability of a larva to move selectively downward during settlement.
Frame-by-frame analyses of these video records permitted us to measure (to the nearest 0.017 s) the time when the edge of a filament encountered or left the chemoreceptive organ of a larva (Hadfield et al., 2000) and the onset or cessation of any of these larval behaviors.
The campaign against dengue larva should be effective and all relevant departments and services agencies should be sensitized to the total eradication of dengue larva.
Cutaneous larva migrans (CLM) presents with the lesions, which seem to creep or migrate.
A small amount of water (0.175 1) from the acclimation enclosures was added in the treatment enclosure before the first trial to insure that the first larva exposed to a treatment had the same chemical signals (congeneric odors) as larvae used in the subsequent treatments within the same enclosure.
A 10 d old larva, the oldest larva observed during our study, measured 10.8 mm TL and had a gape length of over 1 mm, with a total lower jaw length of 1.4 mm, large teeth, and litde to no remaining yolk-sac (Figs.
In 2010,79 individual Chardonnay clusters, each infested with a single larva, were sewn into mesh bags and processed with uninfested clusters in each of two separate press programs with final pressures of 1.5 and 1.8 bars respectively in a 200-pound capacity bladder press at a commercial winery.
A small (~2cm) irregularly shaped yellow secretion surrounded each larva, indicating the impact point.
They found that when a larva was tethered to the bottom of a petri dish, other larvae were attracted to it as it wiggled attempting to free itself.
They also learned that if they slowed down or sped up the video, the larvae were less attracted or not attracted at all to the video larva. They also were not attracted to dead real larva, or to tethered larva of another species, and they also had difficulty finding tethered larva in near darkness.
It was counted the number of attacks of the predator to prey, the number of escapes from jail and the success of prey capture for each larva of M.
To determine the amount of sugar in each larva, 300 uL of supernatant was taken and mixed with 200 uL of distilled water.