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ubstance so related to another substance by modification or partial substitution as to be regarded as derived from it; thus, the amido compounds are derivatives of ammonia, and the hydrocarbons are derivatives of methane, benzene, etc.

A reckless, furious man; a person urged by furious passions, and regardless of consequence; a wild ruffian.

Proceeding from, or suggested by, despair; without regard to danger or safety; reckless; furious; as, a desperate effort. "Desperate expedients." Macaulay.

In a desperate manner; without regard to danger or safety; recklessly; extremely; as, the troops fought desperately. She fell desperately in love with him. Addison.

One who rules regardless of a constitution or laws; a tyrant.

The act of determining the relations of an object, as regards genus and species; the referring of minerals, plants, or animals, to the species to which they belong; classification; as, I am indebted to a friend for the determination of most of these shells.

A liquid hydrocarbon, C10H20, of the ethylene series, regarded as a polymeric form of amylene.

sion of ideas; the construction, disposition, and application of words in discourse, with regard to clearness, accuracy, variety, etc.; mode of expression; language; as, the diction of Chaucer's poems. His diction blazes up into a sudden explosion of prophetic grandeur. De Quincey.

To distinguish or mark by a specific difference; to effect a difference in, as regards classification; to develop differential characteristics in; to specialize; to desynonymize. The word then was differentiated into the two forms then and than. Earle. Two or more of the forms assumed by the same original word become d…

Ethane; -- sometimes so called because regarded as consisting of two methyl radicals. See Ethane.

toward those in authority; unfriendliness; dislike. In the making laws, princes must have regard to . . . the affections and disaffections of the people. Jer. Taylor.

To pass unfavorable judgment upon; to condemn by an act of the judgment; to regard as wrong, unsuitable, or inexpedient; to censure; as, to disapprove the conduct of others.

ne who disciplines; one who excels in training, especially with training, especially with regard to order and obedience; one who enforces rigid discipline; a stickler for the observance of rules and methods of training; as, he is a better disciplinarian than scholar.

Unfavorable aspect; unfriendly regard; cold treatment; disapprobation; whatever tends to check or discourage. He thought a little discountenance on those persons would suppress that spirit. Clarendon.

To shake; to put away; to finish. [Obs.] All regard of shame she had discussed. Spenser.

A feeling of contempt and aversion; the regarding anything as unworthy of or beneath one; scorn. How my soul is moved with just disdain! Pope.

To feel an absence of esteem for; to regard with disfavor or slight contempt; to slight. But if this sacred gift you disesteem. Denham. Qualities which society does not disesteem. Ld. Lytton.

Want of favor of favorable regard; disesteem; disregard. The people that deserved my disfavor. Is. x. 6 (1551). Sentiment of disfavor against its ally. Gladstone.

The condition of being out of favor; loss of favor, regard, or respect. Macduff lives in disgrace. Shak.

To deprive or rid of interest in, or regard for; to disengage. [Obs.]