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Crotalus
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D017839 |
[A genus of snakes of the subfamily Crotalinae, having a hollowed out pit in the maxillary bone between the eye and nostril. Most of the recognized species are found in the southwestern United States and northern Mexico. Several species are found as far north as Canada and east of the Mississippi, including southern Appalachia. They are named for the jointed rattle (Greek krotalon) at the tip of their tail. (Goin, Goin, and Zug: Introduction to Herpetology, 3d ed; Moore: Poisonous Snakes of the World, 1980, p335).
] |
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Croton
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D029802 |
[A plant genus of the family EUPHORBIACEAE. The common name of dragon's blood is also used for DRACAENA and Daemonorops (ARECACEAE). Croton tiglium is the source of CROTON OIL.
] |
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Croton Oil
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D003436 |
[Viscous, nauseating oil obtained from the shrub Croton tiglium (Euphorbaceae). It is a vesicant and skin irritant used as pharmacologic standard for skin inflammation and allergy and causes skin cancer. It was formerly used as an emetic and cathartic with frequent mortality.
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Crotonates
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D003437 |
[Derivatives of BUTYRIC ACID that include a double bond between carbon 2 and 3 of the aliphatic structure. Included under this heading are a broad variety of acid forms, salts, esters, and amides that include the aminobutryrate structure.
, 4-Carbon monounsaturated monocarboxylic acids with the unsaturation in the 2 position.
] |
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Crotoxin
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D003439 |
[A specific complex of toxic proteins from the venom of Crotalus durissus terrificus (South American rattlesnake). It can be separated into a phospholipase A and crotapotin fragment; the latter consists of three different amino acid chains, potentiates the enzyme, and is specifically neurotoxic.
] |
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Croup
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D003440 |
[Inflammation involving the GLOTTIS or VOCAL CORDS and the subglottic larynx. Croup is characterized by a barking cough, HOARSENESS, and persistent inspiratory STRIDOR (a high-pitched breathing sound). It occurs chiefly in infants and children.
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Crowding
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D003441 |
[An excessive number of individuals, human or animal, in relation to available space.
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Crowdsourcing
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D063045 |
[Results of data collected from Crowdsource collection.
, Social media model for enabling public involvement and recruitment in participation. Use of social media to collect feedback and recruit volunteer subjects.
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Crown Compounds
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D047248 |
[Macrocyclic compounds analogous to CROWN ETHERS but which lack any OXYGEN atoms.
, Macrocyclic polyamines related to aza-oxa crowns (CROWN ETHERS).
] |
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Crown Ethers
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D043844 |
[Bicyclic crown compounds.
, Macropolycyclic poly-aza-polyethers that are ether chains linked by three-coordinate nitrogen atoms.
, Macrocyclic polyethers with the repeating unit of (-CH2-CH2-O)n where n is greater than 2 and some oxygens may be replaced by nitrogen, sulfur or phosphorus. These compounds are useful for coordinating CATIONS. The nomenclature uses a prefix to indicate the size of the ring and a suffix for the number of heteroatoms.
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Crown Lengthening
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D016556 |
[Technique combining controlled eruptive TOOTH MOVEMENT TECHNIQUES and incision of the supracrestal gingival attachment to allow for proper restoration of a destroyed or damaged crown of a tooth. Controlled eruption of the tooth is obtained using ORTHODONTIC APPLIANCES. During this eruptive phase, repeated incisions are made at the junctional epithelium of the sulcus and the supracrestal connective tissue to prevent coronal displacement of the gingiva and of the attachment apparatus.
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Crown-Rump Length
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D018568 |
[In utero measurement corresponding to the sitting height (crown to rump) of the fetus. Length is considered a more accurate criterion of the age of the fetus than is the weight. The average crown-rump length of the fetus at term is 36 cm. (From Williams Obstetrics, 18th ed, p91)
] |
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Crowns
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D003442 |
[A prosthetic restoration that reproduces the entire surface anatomy of the visible natural crown of a tooth. It may be partial (covering three or more surfaces of a tooth) or complete (covering all surfaces). It is made of gold or other metal, porcelain, or resin.
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Crows
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D046368 |
[A genus in the family Corvidae comprising mostly CROWS but also ravens, and jackdaws.
, Common name for the largest birds in the order PASSERIFORMES, family Corvidae. These omnivorous black birds comprise most of the species in the genus Corvus, along with ravens and jackdaws (which are often also referred to as crows).
] |
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Crush Injuries
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D000071576 |
[Excessive compression of parts of the body that causes muscle swelling, fracture, and/or neurological disturbances in the affected areas. Crush injury with systemic manifestations is referred to as CRUSH SYNDROME.
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Crush Syndrome
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D003444 |
[Severe systemic manifestation of trauma and ischemia involving soft tissues, principally skeletal muscle, due to prolonged severe crushing. It leads to increased permeability of the cell membrane and to the release of potassium, enzymes, and myoglobin from within cells. Ischemic renal dysfunction secondary to hypotension and diminished renal perfusion results in acute tubular necrosis and uremia.
] |
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Crustacea
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D003445 |
[A class of bivalves in the subphylum CRUSTACEA.
, A large subphylum of mostly marine ARTHROPODS containing over 42,000 species. They include familiar arthropods such as lobsters (NEPHROPIDAE), crabs (BRACHYURA), shrimp (PENAEIDAE), and barnacles (THORACICA).
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Crutches
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D003446 |
[Wooden or metal staffs designed to aid a person in walking. (UMDNS,1999)
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Crying
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D003448 |
[To utter an inarticulate, characteristic sound in order to communicate or express a feeling, or desire for attention.
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Cryoanesthesia
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D050785 |
[ANESTHESIA achieved by lowering either BODY TEMPERATURE (core cooling) or SKIN TEMPERATURE (external cooling).
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