Definition of tentacle

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Tentacle (n.) A more or less elongated process or organ, simple or branched, proceeding from the head or cephalic region of invertebrate animals, being either an organ of sense, prehension, or motion..

Lern More About Tentacle

Sundial :: Sundew (n.) Any plant of the genus Drosera, low bog plants whose leaves are beset with pediceled glands which secrete a viscid fluid that glitters like dewdrops and attracts and detains insects. After an insect is caught, the glands curve inward like tentacles and the leaf digests it. Called also lustwort..
Tentacled :: Tentacled (a.) Having tentacles.
Calycozoa :: Calycozoa (n. pl.) A group of acalephs of which Lucernaria is the type. The body is cup-shaped with eight marginal lobes bearing clavate tentacles. An aboral sucker serves for attachment. The interior is divided into four large compartments. See Lucernarida.
Spirable :: Spiodea (n. pl.) An extensive division of marine Annelida, including those that are without oral tentacles or cirri, and have the gills, when present, mostly arranged along the sides of the body. They generally live in burrows or tubes..
Gastropoda :: Gastropoda (n. pl.) One of the classes of Mollusca, of great extent. It includes most of the marine spiral shells, and the land and fresh-water snails. They generally creep by means of a flat, muscular disk, or foot, on the ventral side of the body. The head usually bears one or two pairs of tentacles. See Mollusca..
Ctenostomata :: Ctenostomata (n. pl.) A suborder of Bryozoa, usually having a circle of bristles below the tentacles..
Phylactolaemata :: Phylactolaemata (n. pl.) An order of fresh-water Bryozoa in which the tentacles are arranged on a horseshoe-shaped lophophore, and the mouth is covered by an epistome. Called also Lophopoda, and hippocrepians..
Acerous :: Acerous (a.) Destitute of tentacles, as certain mollusks..
Stylommatophorous :: Stylommatophora (n. pl.) A division of Pulmonata in which the eyes are situated at the tips of the tentacles. It includes the common land snails and slugs. See Illust. under Snail.
Polyactinia :: Polyactinia (n. pl.) An old name for those Anthozoa which, like the actinias, have numerous simple tentacles..
Basommatophora :: Basommatophora (n. pl.) A group of Pulmonifera having the eyes at the base of the tentacles, including the common pond snails..
Meconidium :: Meconidium (n.) A kind of gonophore produced by hydroids of the genus Gonothyraea. It has tentacles, and otherwise resembles a free medusa, but remains attached by a pedicel..
Actinaria :: Actinaria (n. pl.) A large division of Anthozoa, including those which have simple tentacles and do not form stony corals. Sometimes, in a wider sense, applied to all the Anthozoa, expert the Alcyonaria, whether forming corals or not..
Lophophore :: Lophophore (n.) A disk which surrounds the mouth and bears the tentacles of the Bryozoa. See Phylactolemata.
Rhabdopleura :: Rhabdopleura (n.) A genus of marine Bryozoa in which the tubular cells have a centralchitinous axis and the tentacles are borne on a bilobed lophophore. It is the type of the order Pterobranchia, or Podostomata.
Rhizostomata :: Rhizostomata (n. pl.) A suborder of Medusae which includes very large species without marginal tentacles, but having large mouth lobes closely united at the edges. See Illust. in Appendix..
Phoronis :: Phoronis (n.) A remarkable genus of marine worms having tentacles around the mouth. It is usually classed with the gephyreans. Its larva (Actinotrocha) undergoes a peculiar metamorphosis.
Tentaculata :: Tentaculata (n. pl.) A division of Ctenophora including those which have two long tentacles.
Lucernaria :: Lucernaria (n.) A genus of acalephs, having a bell-shaped body with eight groups of short tentacles around the margin. It attaches itself by a sucker at the base of the pedicel..
Rhinophore :: Rhinophore (n.) One of the two tentacle-like organs on the back of the head or neck of a nudibranch or tectibranch mollusk. They are usually retractile, and often transversely furrowed or plicate, and are regarded as olfactory organs. Called also dorsal tentacles. See Illust. under Pygobranchia, and Opisthobranchia..
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