English definition of Antenna

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Definition of antenna

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Antenna (n.) A movable, articulated organ of sensation, attached to the heads of insects and Crustacea. There are two in the former, and usually four in the latter. They are used as organs of touch, and in some species of Crustacea the cavity of the ear is situated near the basal joint. In insects, they are popularly called horns, and also feelers. The term in also applied to similar organs on the heads of other arthropods and of annelids..

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Nereis :: Nereis (n.) A genus, including numerous species, of marine chaetopod annelids, having a well-formed head, with two pairs of eyes, antennae, four pairs of tentacles, and a protrusile pharynx, armed with a pair of hooked jaws..

Nauplius :: Nauplius (n.) A crustacean larva having three pairs of locomotive organs (corresponding to the antennules, antennae, and mandibles), a median eye, and little or no segmentation of the body..

Scyllarian :: Scyllarian (n.) One of a family (Scyllaridae) of macruran Crustacea, remarkable for the depressed form of the body, and the broad, flat antennae. Also used adjectively..

Moniliform :: Moniliform (a.) Joined or constricted, at regular intervals, so as to resemble a string of beads; as, a moniliform root; a moniliform antenna. See Illust. of Antenna..

Filiform :: Filiform (a.) Having the shape of a thread or filament; as, the filiform papillae of the tongue; a filiform style or peduncle. See Illust. of AntennAe..

Knobbed :: Knobbed (a.) Containing knobs; full of knobs; ending in a nob. See Illust of Antenna.

Dentated :: Dentated (a.) Having teeth or toothlike points. See Illust. of Antennae.

Scaphocerite :: Scaphocerite (n.) A flattened plate or scale attached to the second joint of the antennae of many Crustacea.

Procerite :: Procerite (n.) The segment next to the flagellum of the antennae of Crustacea.

Insecta :: Insecta (n. pl.) One of the classes of Arthropoda, including those that have one pair of antennae, three pairs of mouth organs, and breathe air by means of tracheae, opening by spiracles along the sides of the body. In this sense it includes the Hexapoda, or six-legged insects and the Myriapoda, with numerous legs. See Insect, n..

Frogfish :: Frogfish (n.) An oceanic fish of the genus Antennarius or Pterophrynoides; -- called also mousefish and toadfish.

Subuliform :: Subulicornes (n. pl.) A division of insects having slender or subulate antennae. The dragon flies and May flies are examples.

Nematocera :: Nematocera (n. pl.) A suborder of dipterous insects, having long antennae, as the mosquito, gnat, and crane fly; -- called also Nemocera..

Lamellicorn :: Lamellicorn (a.) Having antennae terminating in a group of flat lamellae; -- said of certain coleopterous insects.

Tunicated :: Tunicated (a.) Having each joint buried in the preceding funnel-shaped one, as in certain antennae of insects..

Lamellated :: Lamellated (a.) Composed of, or furnished with, thin plates or scales. See Illust. of Antennae..

Lamellicorn :: Lamellicorn (a.) Terminating in a group of flat lamellae; -- said of antennae.

Pectinated :: Pectinated (a.) Having very narrow, close divisions, in arrangement and regularity resembling those of a comb; comblike; as, a pectinate leaf; pectinated muscles. See Illust. (e) of Antennae..

Cudweed :: Cudweed (n.) A small composite plant with cottony or silky stem and leaves, primarily a species of Gnaphalium, but the name is now given to many plants of different genera, as Filago, Antennaria, etc.; cottonweed..

Squamellae :: Squame (n.) The scale, or exopodite, of an antenna of a crustacean..