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J gene

(em>Science: molecular biology) Gene or genes coding for the joining segment of polypeptide Chain which links the v (variable regions) to the c (constant) regions of both light and heavy chains of immunoglobulins. During lymphoid development the dna is rearranged so that the v genes are linked to the j region sequences....

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Jaw

/jô/ Noun, pl. jaws 1. Any opposable articulated structure at the entrance of the mouth, typically used for grasping and manipulating food. (wikipedia.org) 2. Term broadly applied to the whole of the structures constituting the vault of the mouth and serving to open and close it and is part of the body plan of most animals. (wikipedia.org) 3. One of the bones, usually bearing teeth, which form the framework of the mouth. (wiktionary.org) 4. The part of the face below the mouth. (wiktionary.org) 5. One of the bones, usually bearing teeth, which form the framework of the mouth. Hence, also, the bone itself with the teeth and covering. (biology-online.org) 6. (Machinery) A notch or opening. A notched or forked part, adapted for holding an object in place. (biology-online.org) 7. Talk or gossip, esp. when lengthy or tedious. (Google Dictionary) Verb 1. To assail or abuse by scolding. (wiktionary.org) 2. To scold; to clamor. (wiktionary.org) 3. To talk; to converse. (wiktionary.org) 4. (of a ball) To stick in the jaws of a pocket. (wiktionary.org) 5. To bite and grind with the teeth. (wordnetweb.princeton.edu) Word origin: From Old French joue “cheek,” from Gaulish *gauta “cheek,” or perhaps a variant of Germanic words related to...

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Jejunum

/jiˈjo͞onəm/ Noun, pl. jejuna (Anatomy) 1. The middle section of the small intestine in most higher vertebrates, including mammals, reptiles, and birds. In fish, the divisions of the small intestine are not as clear and the terms middle intestine or mid-gut may be used instead of jejunum. (wikipedia.org) 2. The central of the three divisions of the small intestine which lies between the duodenum and the ileum. (wiktionary.org) 3. The part of the small intestine between the duodenum and ileum. (Google Dictionary) Word origin: From Latin ieiunum, neuter of ieiunus, “empty, dry, barren,” literally “fasting,...

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Joint

/joint/ Noun, pl. joints 1. The location at which two or more bones connect. They are constructed to allow movement (except for skull bones) and provide mechanical support, and are classified structurally and functionally. (wikipedia.org) 2. A point of articulation between two or more bones, especially such a connection that allows motion. (thefreedictionary.com) 3. A point in the exoskeleton of an invertebrate at which movable parts join, as along the leg of an arthropod. (thefreedictionary.com) 4. (Botany) An articulation on a fruit or stem, such as the node of a grass stem. (thefreedictionary.com) 5. (Geology) A fracture or crack in a rock mass along which no appreciable movement has occurred. (thefreedictionary.com) Word origin: From Old French joint “joint of the body” (12c.), from Latin iunctus “united, connected, associated,” past participle of iungere...

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Jowl

/joul/ Noun, pl. jowls 1. The lower jawbone in vertebrates; it is hinged to open the mouth. (biology-online.org) 2. The cheek of a pig used as meat (Google Dictionary); the cheek; especially the cheek meat of a hog. (wiktionary.org) 3. The loose fleshy part of the neck of certain animals, such as the dewlap of cattle or the wattle of birds. (Google Dictionary) 4. The jaw, jawbone; especially one of the lateral parts of the mandible. (wiktionary.org) 5. A fullness and looseness of the flesh of the lower cheek and jaw (characteristic of aging). (wordnetweb.princeton.edu) Word origin: Alteration of Middle English cholle “fold of flesh hanging from the jaw” (c.1300), perhaps from Old English ceole “throat,” from PIE *gwele- “to swallow”. This word and jowl influenced one another in form and...

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