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hic tracing characteristic of tricrotism shows two secondary crests in addition to the primary.

Of, pertaining to, or designating, that condition of the ovum in which there are three primary germinal layers, or in which the blastoderm splits into three layers.

tiated, U being used only as a vowel or semivowel, and V only as a consonant. The true primary vowel sound of U, in Anglo-Saxon, was the sound which it still retains in most of the languages of Europe, that of long oo, as in tool, and short oo, as in wood, answering to the French ou in tour. Etymologically U is most cl…

giving rotary motion at angles less than 140º (Fig. 2). -- Universal umbel (Bot.), a primary or general umbel; the first or largest set of rays in a compound umbel; -- opposed to partial umbel. A universal involucre is not unfrequently placed at the foot of a universal umbel.

One of the primary planets. It is about 1,800,000,000 miles from the sun, about 36,000 miles in diameter, and its period of revolution round the sun is nearly 84 of our years.

Long-continued practice; customary mode of procedure; custom; habitual use; method. Chaucer. It has now been, during many years, the grave and decorous usage of Parliaments to hear, in respectful silence, all expressions, acceptable or unacceptable, which are uttered from the throne. Macaulay.

Continued or repeated practice; customary employment; usage; custom; manner; habit. Let later age that noble use envy. Spenser. How weary, stale, flat and unprofitable, Seem to me all the uses of this world! Shak.

Denoting usual or customary action. "The usitative aorist." Alford.

ommon use; such as occurs in ordinary practice, or in the ordinary course of events; customary; ordinary; habitual; common. Consultation with oracles was a thing very usual and frequent in their times. Hooker. We can make friends of these usual enemies. Baxter. -- U"su*al*ly, adv. -- U"su*al*ness, n.…

; especially, immoral conduct or habit, as in the indulgence of degrading appetites; customary deviation in a single respect, or in general, from a right standard, implying a defect of natural character, or the result of training and habits; a harmful custom; immorality; depravity; wickedness; as, a life of vice; the v…

Abstinence from sleep, whether at a time when sleep is customary or not; the act of keeping awake, or the state of being awake, or the state of being awake; sleeplessness; wakefulness; watch. "Worn out by the labors and vigils of many months." Macaulay. Nothing wears out a fine face like the vigils of the card table an…

citizens for the oversight and protection of any interest, esp. one organized for the summary suppression and punishment of crime, as when the processes of law appear inadequate.

dation by a male; a parthenogenetic insect. The Virgin, or The Blessed Virgin, the Virgin Mary, the Mother of our Lord. -- Virgin's bower (Bot.), a name given to several climbing plants of the genus Clematis, as C. Vitalba of Europe, and C. Virginiana of North America.

A festival in honor of the visit of the Virgin Mary to Elisabeth, mother of John the Baptist, celebrated on the second of July. The Order of the Visitation of Our Lady (R. C. Ch.), a religious community of nuns, founded at Annecy, in Savoy, in 1610, and in 1808 established in the United States. In America these nuns ar…

The marysole, or sail fluke.

ciænoid food fishes belonging to genus Menticirrhus, especially M. Americanus, found from Maryland to Brazil, and M. littoralis, common from Virginia to Texas; -- called also silver whiting, and surf whiting.

a less tense, and more open and relaxed, condition of the mouth organs; -- opposed to primary as used by Mr. Bell, and to narrow as used by Mr. Sweet. The effect, as explained by Mr. Bell, is due to the relaxation or tension of the pharynx; as explained by Mr. Sweet and others, it is due to the action of the tongue. T…

Accustomed; customary; usual. Again his wonted weapon proved. Spenser. Like an old piece of furniture left alone in its wonted corner. Sir W. Scott. She was wonted to the place, and would not remove. L'Estrange.

A book published yearly; any annual report or summary of the statistics or facts of a year, designed to be used as a reference book; as, the Congregational Yearbook.

Any one of several species of American ground warblers of the genus Geothlypis, esp. the Maryland yellowthroat (G. trichas), which is a very common species.