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population I and II

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

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...

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