cover dentine

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• fish — fishless, adj. /fish/, n., pl. (esp. collectively) fish, (esp. referring to two or more kinds or species) fishes, v. n. 1. any of various cold blooded, aquatic vertebrates, having gills, commonly fins, and typically an elongated body covered with …   Universalium

• Fish — /fish/, n. Hamilton, 1808 93, U.S. statesman: secretary of state 1869 77. * * * I Any of more than 24,000 species of cold blooded vertebrates found worldwide in fresh and salt water. Living species range from the primitive lampreys and hagfishes… …   Universalium

• integument — /in teg yeuh meuhnt/, n. 1. a natural covering, as a skin, shell, or rind. 2. any covering, coating, enclosure, etc. [1605 15; < L integumentum a covering. See IN 2, TEGUMENT] Syn. 1. cortex, involucre, involucrum. * * * Covering of the body,… …   Universalium

• Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

• holostean — ▪ fish Introduction       any member of a group of primitive bony fishes (bony fish) that make up one of the three major subdivisions of the superclass Actinopterygii (ray finned fishes). Holosteans are represented today by the bowfins (bowfin)… …   Universalium

• Enamel — En*am el, n. [Pref. en + amel. See {Amel}, {Smelt}, v. t.] 1. A variety of glass, used in ornament, to cover a surface, as of metal or pottery, and admitting of after decoration in color, or used itself for inlaying or application in varied… …   The Collaborative International Dictionary of English

• Enamel painting — Enamel En*am el, n. [Pref. en + amel. See {Amel}, {Smelt}, v. t.] 1. A variety of glass, used in ornament, to cover a surface, as of metal or pottery, and admitting of after decoration in color, or used itself for inlaying or application in… …   The Collaborative International Dictionary of English

• Enamel paper — Enamel En*am el, n. [Pref. en + amel. See {Amel}, {Smelt}, v. t.] 1. A variety of glass, used in ornament, to cover a surface, as of metal or pottery, and admitting of after decoration in color, or used itself for inlaying or application in… …   The Collaborative International Dictionary of English

• Exoskeleton — The discarded exoskeleton of a dragonfly nymph An exoskeleton is the external skeleton that supports and protects an animal s body, in contrast to the internal skeleton (endoskeleton) of, for example, a human. In popular usage, some of the larger …   Wikipedia

• Dermal denticle — Denticles are body surface structures found on some fish and insects.Denticles or placoid scales are small outgrowths which cover the skin of many cartilaginous fish including sharks. They are similar in structure to teeth, and teeth may have… …   Wikipedia

• cosmine — a form of dentine covered by a layer of enamel and with clusters of dentinal tubules which open to the surface pores and lead into flask shaped cavities. The cavities are are connected by canals (the pore canal system ). Enamel may or may not… …   Dictionary of ichthyology