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grunt

(Encyclopedia)grunt, common name for members of the family Haemulidae, carnivorous fish of warm seas, most species of which are small and brightly colored. They are sound-producers, creating their noises by grindin...

incubator

(Encyclopedia)incubator, apparatus for the maintenance of controlled conditions in which eggs can be hatched artificially. Incubator houses with double walls of mud, a fireroom, and several compartments each holdin...

discus throwing

(Encyclopedia)discus throwing, gymnastic exercise of the ancient Greeks, revived in modern times, especially as part of the Olympic games (in which it is an event of the decathlon) and as an event of most other tra...

dolphin, fish

(Encyclopedia)dolphin, large, swift game fish, Coryphaena hippurus, also called dorado. It is of nearly worldwide distribution in warm waters. Its long, slender body is blue, and in the living animal there are lumi...

pendentive

(Encyclopedia)CE5 Pendentives pendentive, in architecture, a constructive device permitting the placing of a circular dome over a square room or an elliptical dome over a rectangular room. The pendentives, whic...

tobogganing

(Encyclopedia)tobogganing, sport of coasting down snowy hillsides or chutes on a toboggan, a flat-bottomed vehicle made of hard wood. The toboggan, typically measuring 1.5 ft by 6–8 ft (.46 m by 1.8–2.4 m), is ...

Carruthers, George Richard

(Encyclopedia) Carruthers, George Richard, 1939-2020, African-American astrophysicist, b. Cincinnati, OH, Univ. of Illinois at Urbana-Champaign (BS, 1961; MS, nuclear...

sudden infant death syndrome

(Encyclopedia)sudden infant death syndrome (SIDS) or crib death, sudden, unexpected, and unexplained death of an apparently healthy infant under one year of age (usually between two weeks and eight months old). SID...

spring, in mechanics

(Encyclopedia)spring, in mechanics, any of several elastic devices used variously to store and to furnish energy, to absorb shock, to sustain the pressure between contacting surfaces, and to resist tensional or com...

surface chemistry

(Encyclopedia)surface chemistry, study of chemical reactions in which the reactants are first adsorbed onto a surface medium (see adsorption) that then acts as a catalyst for the reaction; after the reaction the pr...