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In my view, the Christian religion is the most important and one of the first things in which all children, under a free government ought to be instructed... No truth is more evident to my mind than that the Christian religion must be the basis of any government intended to secure the rights and privileges of a free people.
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1828 Noah Webster Dictionary
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1828.mshaffer.com › Word [caustic]

Evolution (or devolution) of this word [caustic]

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CAUSTIC,


CAUS'TIC, n.

In medicine, any substance which applied to living animals, acts like fire, in corroding the part and dissolving its texture; an escharotic. [See Causticity.] – Coxe. Encyc. Lunar caustic, a preparation of crystals of silver, obtained by solution in nitric acid, and afterwards fused in a crucible. It is a nitrate of silver. – Nicholson. Caustic curve, in geometry, a curve formed by a coincidence of rays of light reflected from another curve. – Encyc.


Caus"tic
  1. Capable of destroying the texture of anything or eating away its substance by chemical action; burning; corrosive; searing.
  2. Any substance or means which, applied to animal or other organic tissue, burns, corrodes, or destroys it by chemical action; an escharotic.
  3. Severe; satirical; sharp; as, a caustic remark.

    Caustic curve (Optics), a curve to which the ray of light, reflected or refracted by another curve, are tangents, the reflecting or refracting curve and the luminous point being in one plane. -- Caustic lime. See under Lime. -- Caustic potash, Caustic soda (Chem.), the solid hydroxides potash, KOH, and soda, NaOH, or solutions of the same. -- Caustic silver, nitrate of silver, lunar caustic. -- Caustic surface (Optics), a surface to which rays reflected or refracted by another surface are tangents. Caustic curves and surfaces are called catacaustic when formed by reflection, and diacaustic when formed by refraction.

    Syn. -- Stinging; cutting; pungent; searching.

  4. A caustic curve or caustic surface.
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Caustic

CAUSTIC,

CAUSTICAL, adjective Burning; corroding; destroying the texture of animal flesh.

CAUSTIC, noun In medicine, any substance which applied to living animals, acts like fire, in corroding the part and dissolving its texture; an escharotic. [See Causticity.]

Lunar caustic a preparation of crystals of silver, obtained by solution in nitric acid, and afterwards fused in a crucible. It is a nitrate of silver.

CAUSTIC curve, in geometry, a curve formed by a coincidence of rays of light reflected from another curve.

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Word of the Day

importance

IMPORT'ANCE, n.

1. Weight; consequence; a bearing on some interest; that quality of any thing by which it may affect a measure, interest or result. The education of youth is of great importance to a free government. A religious education is of infinite importance to every human being.

2. Weight or consequence in the scale of being.

Thy own importance know.

Nor bound thy narrow views to things below.

3. Weight or consequence in self-estimation.

He believes himself a man of importance.

4. Thing implied; matter; subject; importunity. [In these senses, obsolete.]

Random Word

verticillate

VERTIC'ILLATE, a. [supra.] In botany, verticillate flowers are such as grow in a whirl, or round the stem in rings, one above another, at each joint. The term is also applied in this sense to leaves and branches. Verticillate plants are such as bear whirled flowers.

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