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bites and stings

(Encyclopedia)bites and stings: see first aid. ...

Chandragupta I and II

(Encyclopedia)Chandragupta I and II, Indian emperors. See Gupta. ...

Storm and Stress

(Encyclopedia)Storm and Stress: see Sturm und Drang. ...

population I and II

(Encyclopedia)population I and II, in astronomy: see stellar populations. ...

hydrophone

(Encyclopedia)hydrophone hīˈdrəfōnˌ [key], device that receives underwater sound waves and converts them to electrical energy; the voltage generated can then be read on a meter or played through a loudspeaker....

Aholah and Aholibah

(Encyclopedia)Aholah əhōˈlə [key], in the Bible, the sisters in an allegory on Israel's idolatry. ...

ratchet and pawl

(Encyclopedia)ratchet and pawl, mechanical device that permits motion in one direction only. The ratchet is usually a wheel with slanting teeth. The pawl is a lever tangential to the wheel with one end resting on t...

Douglas, William, 1st earl of Douglas and Mar

(Encyclopedia)Douglas, William, 1st earl of Douglas and Mar, 1327?–1384, Scottish nobleman; nephew of Sir James de Douglas, lord of Douglas. About 1348 he returned to Scotland from France and recaptured the Dougl...

foot-pound

(Encyclopedia)foot-pound, abbr. ft-lb, unit of work or energy in the customary English gravitational system; it is the work done or energy expended by a force of 1 pound acting through a distance of 1 foot. It is e...

thermodynamics

(Encyclopedia)thermodynamics, branch of science concerned with the nature of heat and its conversion to mechanical, electric, and chemical energy. Historically, it grew out of efforts to construct more efficient he...