mating teeth

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• Gear — For the gear like device used to drive a roller chain, see Sprocket. This article is about mechanical gears. For other uses, see Gear (disambiguation). Two meshing gears transmitting rotational motion. Note that the smaller gear is rotating… …   Wikipedia

• List of gear nomenclature — Gears have a wide range of unique terminology known as gear nomenclature. Many of the terms defined cite the same reference work.[1] Contents 1 Addendum 2 Addendum angle 3 Addendum circle …   Wikipedia

• Face width — The face width of a gear is the length of teeth in an axial plane. For double helical, it does not include the gap.Total face width is the actual dimension of a gear blank including the portion that exceeds the effective face width, or as in… …   Wikipedia

• involute tooth — noun : a gear tooth that conforms in contact profile to an involute curve, that engages mating teeth with rolling rather than sliding friction, and that transmits motion with speed practically independent of slight changes in center distance …   Useful english dictionary

• Tooth (animal) — Teeth in animals vary greatly. Some animals, such as turtles and tortoises, are toothless. Other animals, such as sharks, may go through many teeth in their lifetime. The multiple replacement of teeth is known as polyphedont. Since the appearance …   Wikipedia

• 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

• 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

• artiodactyl — artiodactylous, adj. /ahr tee oh dak til/, adj. 1. Zool. having an even number of toes or digits on each foot. n. 2. a hoofed, even toed mammal of the order Artiodactyla, comprising the pigs, hippopotamuses, camels, deer, giraffes, pronghorns,… …   Universalium

• evolution — evolutional, adj. evolutionally, adv. /ev euh looh sheuhn/ or, esp. Brit., /ee veuh /, n. 1. any process of formation or growth; development: the evolution of a language; the evolution of the airplane. 2. a product of such development; something… …   Universalium

• cetacean — cetaceous, adj. /si tay sheuhn/, adj. 1. belonging to the Cetacea, an order of aquatic, chiefly marine mammals, including the whales and dolphins. n. 2. a cetacean mammal. [1830 40; < NL Cetace(a) name of the order (see CET , ACEA) + AN] * * *… …   Universalium

• perissodactyl — perissodactylous, adj. /peuh ris oh dak til/, adj. 1. having an uneven number of toes or digits on each foot. n. 2. any mammal of the order Perissodactyla, comprising the odd toed hoofed quadrupeds and including the tapirs, rhinoceroses, and… …   Universalium