a breathing hole; an opening by which a confined space has communication with the outer air; air hole.
an aperture or orifice through which air or water passes in the act of respiration, as the blowhole of a cetacean.
an opening in the head of sharks and rays through which water is drawn and passed over gills.
one of the external orifices of the tracheal respiratory system of certain invertebrates, usually on the sides of the body.
any of several paired apertures in the cuticle of an insect, by which air enters and leaves the trachea
a small paired rudimentary gill slit just behind the head in skates, rays, and related fishes
any similar respiratory aperture, such as the blowhole in whales
(geology) a protrusion of sediment into a lava flow, formed by the explosive transition of water into steam
An opening through which certain animals breathe, such as the blowhole of a whale or one of the openings in the exoskeleton of an insect.
spiradenoma spi·rad·e·no·ma (spī-rād’n-ō’mə) n. A benign tumor of the sweat glands.
noun 1. spirea. noun 1. any of various plants or shrubs belonging to the genus Spiraea, of the rose family, having clusters of small, white or pink flowers, certain species of which are cultivated as ornamentals. noun 1. any rosaceous plant of the genus Spiraea, having sprays of small white or pink flowers See also […]
noun 1. Geometry. a plane curve generated by a point moving around a fixed point while constantly receding from or approaching it. 2. a helix. 3. a single circle or ring of a spiral or helical curve or object. 4. a spiral or helical object, formation, or form. 5. Aeronautics. a maneuver in which an […]
noun, Astronomy. 1. any of the elongated and curved spiral sections that are connected to the center of a spiral galaxy.