grinding worm
21Gear cutting — is any number of methods used to manufacture precision gears.Gear hobbing is a method by which a special hobbing anto cutter and gear blank are rotated at the same time to transfer the profile of the hob onto the gear blank.Spur and other… …
22medicine, history of — Introduction the development of the prevention and treatment of disease from prehistoric and ancient times to the 20th century. Medicine and surgery before 1800 Primitive (primitive culture) medicine and folklore Unwritten history is not… …
23Moa — This article is about the extinct New Zealand birds known as moa. For other uses, see Moa (disambiguation). Moa Temporal range: Miocene Holocene, 17–0 Ma …
24Lathe — A lathe (pronEng|ˈleɪð) is a machine tool which spins a block of material to perform various operations such as cutting, sanding, knurling, drilling, or deformation with tools that are applied to the workpiece to create an object which has… …
25Darwin from Insectivorous plants to Worms — The life and work of Darwin from Insectivorous plants to Worms followed after the work of Darwin from Descent of Man to Emotions. See inception of Darwin s theory, development of Darwin s theory, publication of Darwin s theory, reaction to Darwin …
26Oxy-fuel welding and cutting — Oxyacetylene redirects here. For the song, see Cubanate. Side of metal, cut by oxygen propane cutting torch …
27biology — /buy ol euh jee/, n. 1. the science of life or living matter in all its forms and phenomena, esp. with reference to origin, growth, reproduction, structure, and behavior. 2. the living organisms of a region: the biology of Pennsylvania. 3. the… …
28coloration — colorational, adj. colorationally, adv. /kul euh ray sheuhn/, n. appearance with regard to color arrangement or use of colors; coloring: the bold coloration of some birds. [1605 15; COLOR + ATION] * * * ▪ biology Introduction in biology,… …
29printing — /prin ting/, n. 1. the art, process, or business of producing books, newspapers, etc., by impression from movable types, plates, etc. 2. the act of a person or thing that prints. 3. words, symbols, etc., in printed form. 4. printed material. 5.… …
30reptile — reptilelike, adj. reptiloid /rep tl oyd /, adj. /rep til, tuyl/, n. 1. any cold blooded vertebrate of the class Reptilia, comprising the turtles, snakes, lizards, crocodilians, amphisbaenians, tuatara, and various extinct members including the… …
