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cam, mechanical device
(Encyclopedia)cam, mechanical device for converting a rotating motion into a reciprocating, or back-and-forth, motion, or for changing a simple motion into a complex one. A simple form of cam is a circular disk set...rivet
(Encyclopedia)rivet, headed metal pin or bolt whose shaft is passed through holes in two or more pieces of metal, wood, plastic, or other material in order to unite them by forming the plain end into a second head....almond
(Encyclopedia)almond, name for a small tree (Prunus amygdalus) of the family Rosaceae (rose family) and for the nutlike, edible seed of its drupe fruit. The “nuts” of sweet-almond varieties are eaten raw or roa...surveying
(Encyclopedia)surveying, method of determining accurately points and lines of direction (bearings) on the earth's surface and preparing from them maps or plans. Boundaries, areas, elevations, construction lines, an...Leyden jar
(Encyclopedia)Leyden jar līˈdən [key], form of capacitor invented at the Univ. of Leiden in the 18th cent. It consists of a narrow-necked glass jar coated over part of its inner and outer surfaces with conductiv...night blindness
(Encyclopedia)night blindness, inability to see normally in subdued light. It is usually a result of vitamin A deficiency. The rod cells, one of two light-sensitive areas of the retina of the eye, are impaired in t...Pomo
(Encyclopedia)Pomo, Native Americans of N California, belonging to the Hokan branch of the Hokan-Siouan linguistic stock (see Native American languages). The Pomo were the most southerly Native Americans on the Cal...eccentric
(Encyclopedia)eccentric, in mechanics, device for changing rotary to back-and-forth motion. A disk is mounted off center on a shaft. One flat, open, circular end of a rod fits around the edge of the disk; the other...Young's modulus
(Encyclopedia)Young's modulus [for Thomas Young], number representing (in pounds per square inch or dynes per square centimeter) the ratio of stress to strain for a wire or bar of a given substance. According to Ho...notochord
(Encyclopedia)notochord nōˈtəkôrdˌ [key], in biology, supporting rod running most of the length of animals of the phylum Chordata and present at varying times in the life cycle. Composed of large cells packed ...Browse by Subject
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