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Y- :: Y- () A prefix of obscure meaning, originally used with verbs, adverbs, adjectives, nouns, and pronouns. In the Middle English period, it was little employed except with verbs, being chiefly used with past participles, though occasionally with the infinitive Ycleped, or yclept, is perhaps the only word not entirely obsolete which shows this use..

Rh/tic :: Rh/tic (a.) Pertaining to, or of the same horizon as, certain Mesozoic strata of the Rhetian Alps. These strata are regarded as closing the Triassic period. See the Chart of Geology..

Fluxion :: Fluxion (n.) The infinitely small increase or decrease of a variable or flowing quantity in a certain infinitely small and constant period of time; the rate of variation of a fluent; an incerement; a differential.

Genesee Epoch :: Genesee epoch () The closing subdivision of the Hamilton period in the American Devonian system; -- so called because the formations of this period crop out in Genesee, New York..

Free-soil :: Free-soil (a.) Pertaining to, or advocating, the non-extension of slavery; -- esp. applied to a party which was active during the period 1846-1856..

Nightertale :: Nightertale (n.) period of night; nighttime.

Periodic :: Periodic (a.) Alt. of Periodica.

Limitation :: Limitation (v. t.) A certain period limited by statute after which the claimant shall not enforce his claims by suit.

Adolescence :: Adolescence (n.) The state of growing up from childhood to manhood or womanhood; youth, or the period of life between puberty and maturity, generally considered to be, in the male sex, from fourteen to twenty-one. Sometimes used with reference to the lower animals..

Archaeolithic :: Archaeolithic (a.) Of or pertaining to the earliest Stone age; -- applied to a prehistoric period preceding the Paleolithic age.

Thermetograph :: Thermetograph (n.) A self-registering thermometer, especially one that registers the maximum and minimum during long periods..

Watch :: Watch (v. i.) The period of the night during which a person does duty as a sentinel, or guard; the time from the placing of a sentinel till his relief; hence, a division of the night..

Classical :: Classical (n.) Of or pertaining to the ancient Greeks and Romans, esp. to Greek or Roman authors of the highest rank, or of the period when their best literature was produced; of or pertaining to places inhabited by the ancient Greeks and Romans, or rendered famous by their deeds..

Quinine :: Quinine (n.) An alkaloid extracted from the bark of several species of cinchona (esp. Cinchona Calisaya) as a bitter white crystalline substance, C20H24N2O2. Hence, by extension (Med.), any of the salts of this alkaloid, as the acetate, chloride, sulphate, etc., employed as a febrifuge or antiperiodic. Called also quinia, quinina, etc..

Annals :: Annals (n. pl.) A periodic publication, containing records of discoveries, transactions of societies, etc.; as Annals of Science..

Quadrennium :: Quadrennium (n.) A space or period of four years.

Subelongate :: Subeditor (n.) An assistant editor, as of a periodical or journal..

Hypnocyst :: Hypnocyst (n.) A cyst in which some unicellular organisms temporarily inclose themselves, from which they emerge unchanged, after a period of drought or deficiency of food. In some instances, a process of spore formation seems to occur within such cysts..

Member :: Member (n.) A part of a discourse or of a period or sentence; a clause; a part of a verse.

Periodontal :: Periodontal (a.) Surrounding the teeth.

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