A hard, projecting, and usually pointed organ, growing upon the heads of certain animals, esp. of the ruminants, as cattle, goats, and the like. The hollow horns of the Ox family consist externally of true horn, and are never shed.
The tough, fibrous material of which true horns are composed, being, in the Ox family, chiefly albuminous, with some phosphate of lime; also, any similar substance, as that which forms the hoof crust of horses, sheep, and cattle; as, a spoon of horn.
the hollow horn of an animal (without the core) used as a vessel or a musical instrument, with senses thence developed; a non-deciduous excrescence, often curved and pointed, consisting of an epidermal sheath growing about a bony core, on the head of certain mammals, as cattle, sheep, goats, antelopes, etc., and serving as a weapon or defence
One of a pair of hard, permanent structures on the frontal bones of the head in members of the family Bovidae. True horns consist of a bony core covered with a sheath of keratinous material. 'Horn' is also used to refer to the keratinous growth on the midline of the nose of the Rhinocerotidae, although these are not true horns due to the lack of a bony core.
Horn is an organic substance made mostly of the fibrous protein called keratin (our nails, hair, bull's horns, feather quills, and horse hoofs are also made of keratin). Some dinosaurs, like Triceratops, had bone-like "horns" that may have been covered by a layer of keratin (horn) when they were alive. Since keratin does not fossilize well, we do not know if horn covered the bone and if so, how much it was.
"A non-deciduous excrescence, often curved and pointed, consisting of an epidermal sheathe growing over a bony core and on the heads of animals serving as a weapon of offense or defense." ("Oxford English Dictionary," 1971.)
n. one of the hard, usually permanent structure projecting from the head of certain mammals, such as cattle, sheep, goats, or antelopes, consisting of a bony core covered with a sheath of keratinous material.
A horn is a hollow, pointed projection of the skin of various animals, consisting mainly of keratin as well as other proteins. True horns are found only among the ruminant artiodactyls, in the families Antilocapridae (pronghorn) and Bovidae (cows, buffalo, yaks, goats, antelope etc.). Those animals have one or two pairs of horns, which usually have a spiral shape.
A pointed, mountain peak, typically pyramidal in shape, bounded by the walls of three or more cirques. Headward erosion has cut prominent faces and ridges into the peak. When a peak has four symmetrical faces, it is called a Matterhorn. ------------------------------- Ice Rafting The transportation of glacier sediment away from the ice margin by icebergs. Sediment transported by floating ice and deposited in the ocean is called glacial-marine sediment. Deposited in lakes, it is called glacial-lacustrine sediment.
A high pyramidal peak with steep sides formed by the intersecting walls of three or more cirques. One of the more recognized examples of a horn in North America is Grand Teton in Grand Teton National Park, Wyoming.
a peak or pinnacle thinned and eroded by three or more glacial cirques. The Matterhorn in Switzerland was carved away by glacial erosion. (Photo courtesy of the World Data Center for Glaciology, Boulder, CO.)
(i) Hard, insensitive outer covering of the hoof. (ii) Prominent pommel at the front of a western saddle around which the rider loops or twists the lariet when a steer has been roped to secure the animal. See also Saddle Horn.
An expanding acoustical waveguide in front of a loudspeaker driver, or compression driver, that shapes the wavefront of the sound as it radiates away from the source. This allows designers to control vertical and horizontal dispersion characteristics, essential to achieving good audience coverage in sound reinforcement systems, and increasingly used to finesse the frequency-dependent directivity of consumer loudspeakers to improve sound quality. Being acoustical transformers, horns can also improve the acoustical efficiency of the drivers. See: Compression Driver, Driver, Directivity, Throat.
1) The part of the speaker that emits midrange and higher range frequencies. 2) A speaker or speaker enclosure where sound waves are put into a narrow opening (by a speaker cone or driver) and the narrow opening flairs out to a larger opening.
A type of speaker that looks like a horn. These speakers have small drivers and very large mouths; the horn shape serves to transform the small radiating area of the driver into the much larger radiating area of the mouth of the horn.
A type of speaker that often looks like a horn. These speakers have very small drivers and very large mouths; the horn shape serves to gradually match the high impedance of the driver to the low impedance of the air.
Element used in some speaker designs to increase efficiency by placing the driver at the end of a megaphone-like piece if metal, plastic, wood or other material that expands outward from the driver similar to an ice cream cone expanding outward from its point (apex).
A horn is a tapered, sound guide designed to provide an acoustic impedance match between a sound source and free air. This has the effect of maximising the efficiency with which sound waves from the particular source are transferred to the air. Conversely, a horn can be used at the receiving end to optimise the transfer of sound from the air to a receiver.
The horn is a brass instrument that consists of tubing wrapped into a coiled form, now with finger-operated valves to help control the pitch but originally without valves to control the pitch (this kind of horn is now called a natural horn, which is a retronym since at that time, all French horns had were natural horns.) The instrument was first developed in England as a hunting horn in about 1650. The French refer to the modern valved instrument as the horn of harmony, the Germans call it the hunting horn, and the English and Americans call it the French horn.
A long spiked projection from the rear of the larva. It may serve as camouflage. Although all Manduca emerge with the horn, many loose it during larval life. Sometimes its referred to as the dorsal horn.
Mounted either outside the machine (visible), or hidden within the cabinet, the horn connects to the tone arm and amplifies the sound from the reproducer. Horns are generally constructed out of metal, although they can also be constructed of paper, plastic, or wood.
The horn (Vietnamese dáº¥u mÃ³c) is a diacritic mark attached to the top right corner of the letters o and u in the Vietnamese alphabet to give Æ¡ and Æ°, unrounded variants of the vowel represented by the basic letter. In Vietnamese, it is rarely considered a separate diacritic; rather, the characters Æ¡ and Æ° are considered separate from o and u.