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Spicule :: Spicule (n.) A minute, slender granule, or point..

Spiculigenous :: Spiculigenous (a.) Producing or containing spicules.

Spicule :: Spicule (n.) Same as Spicula.

Spink :: Spinii-spirulate (a.) Having spines arranged spirally. See Spicule.

Tricurvate :: Tricurvate (a.) Curved in three directions; as, a tricurvate spicule (see Illust. of Spicule)..

Tetraxile :: Tetraxile (a.) Having four branches diverging at right angles; -- said of certain spicules of sponges.

Glass-sponge :: Glass-sponge (n.) A siliceous sponge, of the genus Hyalonema, and allied genera; -- so called from their glassy fibers or spicules; -- called also vitreous sponge. See Glass-rope, and Euplectella..

Rosette :: Rosette (n.) Any structure having a flowerlike form; especially, the group of five broad ambulacra on the upper side of the spatangoid and clypeastroid sea urchins. See Illust. of Spicule, and Sand dollar, under Sand..

Spiculate :: Spiculate (a.) Covered with, or having, spicules..

Hyalospongia :: Hyalospongia (n. pl.) An order of vitreous sponges, having glassy six-rayed, siliceous spicules; -- called also Hexactinellinae..

Spicule :: Spicule (n.) Any small calcareous or siliceous body found in the tissues of various invertebrate animals, especially in sponges and in most Alcyonaria..

Anchor :: Anchor (n.) One of the anchor-shaped spicules of certain sponges; also, one of the calcareous spinules of certain Holothurians, as in species of Synapta..

Spiculispongiae :: Spiculispongiae (n. pl.) A division of sponges including those which have independent siliceous spicules.

Scepterellate :: Scepterellate (a.) Having a straight shaft with whorls of spines; -- said of certain sponge spicules. See Illust. under Spicule.

Sexradiate :: Sexradiate (a.) Having six rays; -- said of certain sponge spicules. See Illust. of Spicule.

Amphidisc :: Amphidisc (n.) A peculiar small siliceous spicule having a denticulated wheel at each end; -- found in freshwater sponges.

Calcispongiae :: Calcispongiae (n. pl.) An order of marine sponges, containing calcareous spicules. See Porifera..

Hexactinellid :: Hexactinellid (a.) Having six-rayed spicules; belonging to the Hexactinellinae.

Tetractinellida :: Tetractinellida (n. pl.) A division of Spongiae in which the spicules are siliceous and have four branches diverging at right angles. Called also Tetractinellinae.

Silicoidea :: Silicoidea (n. pl.) An extensive order of Porifera, which includes those that have the skeleton composed mainly of siliceous fibers or spicules..

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