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Orbicular
Orbicular is an adjective meaning "circular" Orbicular may also refer to: * Orbicular leaf, a plant leaf shape * Orbicularis oculi muscle, a muscle around the eye * Orbicularis oris muscle, a muscle around the mouth * Orbicular batfish, a species of fish * Caracanthus, the orbicular velvet fishes * Orbicular granite, a rock type * Orbicular jasper Orbicular jasper is a variety of jasper which contains variably-colored ''orbs'' or spherical inclusions or zones. In highly silicified rhyolite or tuff, quartz and feldspar crystallize in radial aggregates of needle-like crystals which provide th ..., a variety of jasper * Orbicular stigma, a spot on wings of certain moths {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orbicular Granite
Orbicular granite (also known as orbicular rock or orbiculite) is an uncommon plutonic rock type which is usually granitic in composition. These rocks have a unique appearance due to ''orbicules'' - concentrically layered, spheroidal structures, probably formed through nucleation around a grain in a cooling magma chamber due to rapid physical changes. Almost one third of known orbicular rock occurrences are from Finland. The occurrences are usually very small. Occurrences Chile *On the coastline eleven kilometres north of Caldera, Northern Chile, there is a body of Jurassic orbicular granite which is dyke-like with an exposed surface area of approximately 375 m2, enclosed in a tonalitic batholith. Where visible, the contact between country rock and the orbicular body is characterized by a zone of comb layering. The orbicular body has a porphyritic granodiorite matrix. The surface ratio of matrix/orbicules is 35/65; orbicules are mainly ellipsoidal with an average axis of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orbicular Jasper
Orbicular jasper is a variety of jasper which contains variably-colored ''orbs'' or spherical inclusions or zones. In highly silicified rhyolite or tuff, quartz and feldspar crystallize in radial aggregates of needle-like crystals which provide the basis or ''seed'' for the orbicular structure seen in this kind of jasper. The material is quite attractive when polished and is used as an ornamental stone or gemstone. Various local or commercial names have been used for the material, such as kinradite, oregonite, owyhee jasper, ocean jasper and poppy-patterned jasper, depending on the source. ''Poppy-patterned jasper'' or ''poppy jasper'' is the varietal name for material from several locations, but the most well known is from Morgan Hill, Santa Clara County, California. The trade name ''ocean jasper'' is used for a variety found along the intertidal shores of northeast Madagascar. In Nebraska orbicular jasper is found in altered rhyolite beds noted for a variety of jaspers and rel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orbicularis Oris Muscle
In human anatomy, the orbicularis oris muscle is a complex of muscles in the lips that encircles the mouth. It is a sphincter, or circular muscle, but it is actually composed of four independent quadrants that interlace and give only an appearance of circularity.Saladin, "Anatomy & Physiology: The Unity of Form and Function". 5th edition. McGraw Hill. Page 330 It is also one of the muscles used in the playing of all brass instruments and some woodwind instruments. This muscle closes the mouth and puckers the lips when it contracts. Structure The orbicularis oris is not a simple sphincter muscle like the orbicularis oculi; it consists of numerous strata of muscular fibers surrounding the orifice of the mouth, but having different direction. It consists partly of fibers derived from the other facial muscles which are inserted into the lips, and partly of fibers proper to the lips. Of the former, a considerable number are derived from the buccinator and form the deeper stratum of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orbicularis Oculi Muscle
The orbicularis oculi is a muscle in the face that closes the eyelids. It arises from the nasal part of the frontal bone, from the frontal process of the maxilla in front of the lacrimal groove, and from the anterior surface and borders of a short fibrous band, the medial palpebral ligament. From this origin, the fibers are directed laterally, forming a broad and thin layer, which occupies the eyelids or palpebræ, surrounds the circumference of the orbit, and spreads over the temple, and downward on the cheek. Structure There are at least 3 clearly defined sections of the orbicularis muscle. However, it is not clear whether the lacrimal section is a separate section, or whether it is just an extension of the preseptal and pretarsal sections. Orbital orbicularis The orbital portion is thicker and of a reddish color; its fibers form a complete ellipse without interruption at the lateral palpebral commissure; the upper fibers of this portion blend with the frontalis and corrugator ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orbicular Batfish
The orbicular batfish (''Platax orbicularis''), also known as the circular batfish, orbiculate batfish, round batfish, or orbic batfish is a popular aquarium fish which occurs naturally in the tropical waters of the Indian and Pacific Oceans. These fishes are sought after for their high prize by nearby pacific communities as they are known for their high-quality meat. Description The body of ''Platax orbicularis'' is almost disc-shaped, and very thin. Its tail, about 20% of the body length, is fan-shaped and is taller than it is long. Males can grow to up to in length, though aquarium specimens are generally much shorter. Distribution In the wild, the orbicular batfish is found in brackish or marine waters, usually around reefs, at depths from 5 to 30 meters. Its range extends from the Red Sea and East Africa in the east to the Tuamotu Islands in French Polynesia in the west, and from southern Japan in the north to northern Australia and New Caledonia. It has been recorded off ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orbicular (leaf)
The following is a list of terms which are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (a single leaf blade or lamina) or compound (with several leaflets). The edge of the leaf may be regular or irregular, may be smooth or bearing hair, bristles or spines. For more terms describing other aspects of leaves besides their overall morphology see the leaf article. The terms listed here all are supported by technical and professional usage, but they cannot be represented as mandatory or undebatable; readers must use their judgement. Authors often use terms arbitrarily, or coin them to taste, possibly in ignorance of established terms, and it is not always clear whether because of ignorance, or personal preference, or because usages change with time or context, or because of variation between specimens, even specimens from the same plant. For example, whether to call leaves on the same tree "acuminate", "lanceolate", or "linear" could ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caracanthus
''Caracanthus'', the coral crouchers, or orbicular velvetfishes, are a genus of ray-finned fishes. They live in coral reefs of the tropical Indo-Pacific. This genus is the only member of the monotypic subfamily Caracanthinae, part of the family Scorpaenidae. Taxonomy ''Caracanthus'' was first formally described as a monotypic genus in 1845 by the Danish zoologist Henrik Nikolai Krøyer when he described the new species the Hawaiian orbicular velvetfish ('' Caracanthus typicus''). The genus is the only genus in the monotypic subfamily Caracanthinae within the family Scorpaenidae. Molecular studies have found that the Caracanthinae should probably be treated as a tribe within the subfamily Scorpaeninae, or possibly included in the tribe Scorpaenini. The genus name is a compound of ''cara'', meaning "head" and ''acanthus'', maening "thorn" or "spine", an allusion to the strong spines on the infraorbital bone of ''C. typicus''. Characteristics ''Caracanthus'' fishes have an oval, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
