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larval
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- Larval - a. - Of or pertaining to a larva.
- Larvalia - n. pl. - An order of Tunicata, including Appendicularia, and allied genera; -- so called because certain larval features are retained by them through life. Called also Copelata. See Appendicularia.
- Miner - n. - Any of numerous insects which, in the larval state, excavate galleries in the parenchyma of leaves. They are mostly minute moths and dipterous flies.
- Longicornia - n. pl. - A division of beetles, including a large number of species, in which the antennae are very long. Most of them, while in the larval state, bore into the wood or beneath the bark of trees, and some species are very destructive to fruit and shade trees. See Apple borer, under Apple, and Locust beetle, under Locust.
- Bark beetle - - A small beetle of many species (family Scolytidae), which in the larval state bores under or in the bark of trees, often doing great damage.
- Trochosphere - n. - A young larval form of many annelids, mollusks, and bryozoans, in which a circle of cilia is developed around the anterior end.
- Cilia - n. pl. - Small, generally microscopic, vibrating appendages lining certain organs, as the air passages of the higher animals, and in the lower animals often covering also the whole or a part of the exterior. They are also found on some vegetable organisms. In the Infusoria, and many larval forms, they are locomotive organs.
- Proscolex - n. - An early larval form of a trematode worm; a redia. See Redia.
- Caterpillar - n. - The larval state of a butterfly or any lepidopterous insect; sometimes, but less commonly, the larval state of other insects, as the sawflies, which are also called false caterpillars. The true caterpillars have three pairs of true legs, and several pairs of abdominal fleshy legs (prolegs) armed with hooks. Some are hairy, others naked. They usually feed on leaves, fruit, and succulent vegetables, being often very destructive, Many of them are popularly called worms, as the cutworm, cankerworm, army worm, cotton worm, silkworm.
- Bagworm - n. - One of several lepidopterous insects which construct, in the larval state, a baglike case which they carry about for protection. One species (Platoeceticus Gloveri) feeds on the orange tree. See Basket worm.
- Polyeidic - a. - Passing through several distinct larval forms; -- having several distinct kinds of young.
- Veliger - n. - Any larval gastropod or bivalve mollusk in the state when it is furnished with one or two ciliated membranes for swimming.
- Gastraea - n. - A primeval larval form; a double-walled sac from which, according to the hypothesis of Haeckel, man and all other animals, that in the first stages of their individual evolution pass through a two-layered structural stage, or gastrula form, must have descended. This idea constitutes the Gastraea theory of Haeckel. See Gastrula.
- Eruca - n. - An insect in the larval state; a caterpillar; a larva.
- Brachiolaria - n. pl. - A peculiar early larval stage of certain starfishes, having a bilateral structure, and swimming by means of bands of vibrating cilia.
- Trichina - n. - A small, slender nematoid worm (Trichina spiralis) which, in the larval state, is parasitic, often in immense numbers, in the voluntary muscles of man, the hog, and many other animals. When insufficiently cooked meat containing the larvae is swallowed by man, they are liberated and rapidly become adult, pair, and the ovoviviparous females produce in a short time large numbers of young which find their way into the muscles, either directly, or indirectly by means of the blood. Their presence in the muscles and the intestines in large numbers produces trichinosis.
- Measly - a. - Containing larval tapeworms; -- said of pork and beef.
- Echinococcus - n. - A parasite of man and of many domestic and wild animals, forming compound cysts or tumors (called hydatid cysts) in various organs, but especially in the liver and lungs, which often cause death. It is the larval stage of the Taenia echinococcus, a small tapeworm peculiar to the dog.
- Siredon - n. - The larval form of any salamander while it still has external gills; especially, one of those which, like the axolotl (Amblystoma Mexicanum), sometimes lay eggs while in this larval state, but which under more favorable conditions lose their gills and become normal salamanders. See also Axolotl.
- Metanauplius - n. - A larval crustacean in a stage following the nauplius, and having about seven pairs of appendages.
- Cysticercus - n. - The larval form of a tapeworm, having the head and neck of a tapeworm attached to a saclike body filled with fluid; -- called also bladder worm, hydatid, and measle (as, pork measle).
- Encystment - n. - A process by which many internal parasites, esp. in their larval states, become inclosed within a cyst in the muscles, liver, etc. See Trichina.
- Urochord - n. - The central axis or cord in the tail of larval ascidians and of certain adult tunicates.
- Acephalocyst - n. - A larval entozoon in the form of a subglobular or oval vesicle, or hydatid, filled with fluid, sometimes found in the tissues of man and the lower animals; -- so called from the absence of a head or visible organs on the vesicle. These cysts are the immature stages of certain tapeworms. Also applied to similar cysts of different origin.
- Stage - n. - One of several marked phases or periods in the development and growth of many animals and plants; as, the larval stage; pupa stage; zoea stage.
- Zoea - n. - A peculiar larval stage of certain decapod Crustacea, especially of crabs and certain Anomura.
- Coenurus - n. - The larval stage of a tapeworm (Taenia coenurus) which forms bladderlike sacs in the brain of sheep, causing the fatal disease known as water brain, vertigo, staggers or gid.