n. The four types first recognized and frequently referred to, namely, hydrochloric acid, water, ammonia, and marsh-gas, simply represent the first four degrees of valence, monad, dyad, triad, and tetrad.To use a type-writer.n. A distinguishing mark or sign; a classifying stamp or emblem; a mark or an object serving for a symbol or an index, or anything that indicates office, occupation, or character.n. Something that has a representative or symbolical significance; an emblem, or an emblematic instance.n. Specifically, a prefigurement; aforeshadowing of, or that which foreshows, some reality to come, which is called the antitype; particularly, in theology, a person, thing, or event in the Old Testament regarded as foreshowing or betokening a corresponding reality of the new dispensation; a prophetic similitude: as, the paschal lamb is the type of Christ (who is the antitype).n. A characteristic embodiment; a definitive example or standard; an exemplar; a pattern; a model.n. A representative style, mode, or structure; a characteristic assemblage of particulars or qualities.n. In biology, specifically, a main division of the animal or vegetable kingdom; a sub-kingdom, branch, phylum, or province.n. A model or style that serves as a guide; a general plan or standard for the doing of anything; especially, in the arts, the plan, idea, or conception upon which anything is modeled or according to which any work is executed.n. A right-angled prism-shaped piece of metal or wood, having for its face a letter or character (usually in high relief), adapted for use in letterpress printing; collectively, the assemblage of the stamped characters used for printing; types inthe aggregate.n. In numismatics, the principal device or subject on the obverse and reverse of a coin or medal.n. In chem., a fundamental chemical compound which represents the structure of a large number of other and more complex compounds.n. In church hist., an edict of the emperor Constans II., issued in 648.n. In mathematics, a succession of symbols susceptible of + and—signs.n. upon the face of the generic diagnosis originally made, orn. upon the specific contents—that is, upon the species actually grouped under the generic name. Nearly all the older genera were made more comprehensive than modern genera are allowed to be, and have been restricted by reference of nearly all (often of all but one) of their usually numerous species to other genera; yet a generic name once established upon any species must always rest upon some (one or more) species; hence the occasion and the necessity for the determination of the type species in every such case. This has been done mainly in three ways.n. The first species given by an author in the list of the species of his genus is arbitrarily assumed to be his type species. But this is a mere convention, which often becomes an absurdity.n. The species which agrees best with the author's diagnosis of his genus is selected as the type species. This is reasonable, but it is at best a matter of opinion, and opinions differ enough to unsettle the whole system of nomenclature if each is to be allowed its own full weight.n. The most feasible and only safe procedure is to consider that species to be the type species which has as a matter of fact been left in the original genus from which the other species have been successively detached to form new genera; or, if there be more than one left, to choose the best-known, that being almost always the one which has oftenest borne the original generic name, and hence is most closely identified with it. For example: Let there be a Linnean genus Aba, with 3 species, A: oca, A. ada, and A, aga; let A. ada and A. aga have been detached as types respectively of two new genera; then A. aca remains as the type species of the original genus Aba, in its now restricted sense. This rule is applicable with force and precision to thousands of questionable cases; and its observance, together with insistence upon the fundamental law of priority, tends to the utmost attainable fixity of zoological and botanical nomenclature.n. Synonyms Image, shadow, adumbration, prophecy.n. 2 and Symbol, etc. See emblem.n. 4–6, Prototype, archetype, standard form.To exhibit or constitute a type of; typify.To reproduce in type, or by impression from types, as with a type-writer.