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ommercial zinc; -- so called because certain of its compounds are darkened by exposure to light.

nt for measuring and recording the variations in the actinic or chemical force of rays of light. Nichol.

The science which treats of rays of light, especially of the actinic or chemical rays.

An instrument for measuring the actinic effect of rays of light.

The measurement of the chemical or actinic energy of light. Abney.

Having the power or quality of acting; causing change; communicating action or motion; acting; -- opposed to Ant: passive, that receives; as, certain active principles; the powers of the mind.

ne whose profession it is to calculate for insurance companies the risks and premiums for life, fire, and other insurances.

Having a sting; covered with prickles; sharp like a prickle.

Like a prickle.

A prickle growing on the bark, as in some brambles and roses. Lindley.

Terminating in a flat, narrow end. Lindley.

The insertion of needles into the living tissues for remedial purposes.

ich has obtained credit by long use; a proverb. Letting "I dare not" wait upon "I would," Like the poor cat i' the adage. Shak.

ein (Verbascum thapsus). -- Adam's needle (Bot.), the popular name of a genus (Yucca) of liliaceous plants.

Made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains.

things together; -- opposed to subtraction or diminution. "This endless addition or addibility of numbers." Locke.

Liquid filth; mire. [Obs.]

To draw towards a common center or a middle line. Huxley.

A muscle which draws a limb or part of the body toward the middle line of the body, or closes extended parts of the body; -- opposed to abductor; as, the adductor of the eye, which turns the eye toward the nose. In the bivalve shells, the muscles which close the values of the shell are called adductor muscles. Verrill.…

The revocation or taking away of a grant donation, legacy, or the like. Bouvier.