rudimentary ray
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ray — 1) a ray (excluding spines) is a flexible, rod like segmented and often branched, bilaterally paired fin support of dermal origin. Rays may be divided into soft rays (as just described) and hard rays or pseudacanths which are ossified, inflexible … Dictionary of ichthyology
Oval electric ray — Conservation status Data Deficient … Wikipedia
X-ray lithography — is a next generation lithography that has been developed for the semiconductor industryref|vlad. Batches of microprocessors have already been produced. The short wavelengths of 0.8 nm X rays overcome diffraction limits in the resolution of… … Wikipedia
principal ray — a large ray, branched or unbranched, larger than the minor or rudimentary rays. In the caudal fin the principal rays are usually attached to the hypural plates, are larger than the rudimentary rays; and usually include, in adults, the branched… … Dictionary of ichthyology
caudal fin ray count — usually only the principal or main rays are counted, the tiny rudimentary, often procurrent rays are not included. In fishes with branched rays, the principal count is the number of branched rays plus two. These rays are usually markedly larger… … Dictionary of ichthyology
chondrichthian — /kon drik thee euhn/, n. any member of the class Chondrichthyes, comprising the cartilaginous fishes. [ < NL, equiv. to chondr CHONDR + Gk ichthýes (pl.) fish] * * * ▪ fish class Introduction class name Chondrichthyes, or Selachii any… … Universalium
perciform — ▪ fish order Introduction any member of the order Perciformes, a group of bony fishes with more than 6,000 species placed in about 150 families. The order is the largest group of fishes in the world today. Perciform fishes occur in… … Universalium
Glossary of botanical terms — Many of the terms used in Wikipedia glossaries (often most) are already defined and explained within Wikipedia itself. However, lists like the following indicate where new articles need to be written and are also useful for looking up and… … Wikipedia
Evolution — Evolution (History and Scientific Foundation) † Catholic Encyclopedia ► Evolution (History and Scientific Foundation) The world of organisms comprises a great system of individual forms generally classified according to structural… … Catholic encyclopedia
Artificial intelligence — AI redirects here. For other uses, see Ai. For other uses, see Artificial intelligence (disambiguation). TOPIO, a humanoid robot, played table tennis at Tokyo International Robot Exhibition (IREX) 2009.[1] Artificial intelligence ( … Wikipedia
