TEREBRATULA

(Lat.terebro,76orc.) The name of a genus of Palliobranchiate Acephalous Bivalve Mollusks, in which one of the valves is perforated for the transmi ion of a peduncle: the hole through which the peduncle pa es is completed by a small detached calcareous piece. TEREDO. {lja.t.tQxeAo, the ship-worm.) The name of a genus of Acephalous MoUusks which bore their habitations in submerged timber, and occasion destructive ravages in sunken piles, ships' bottoms, . TERGUM (Lat. tergum, the back), in Entomology, signifies the upper or supine surface of the abdomen. TERM (Lat. terminus, a boundary), in Logic, is the expre ion in language of the notion obtained in an act of apprehension. (See Apprehension.) A term may consist of one word, or of several; but every word is not capable of being employed by itself as a term, or, in logical language, categorematic. Adverbs, prepositions, ., and also nouns in any otlier case besides the nominative, are syncategorematic, i. e. can only form part of 1223 TERMITES. a term; while a verb is a mixed word, being resolvable into the copula (or auxiliary verb) and the term, to which the copula gives tense, mood, and position; but an infinitive mood is a term by itself. Simple terms, or cate go rem a tics, are divided into singular and common. A singular term stands for one individual; as " Caesar," " the king." It is obvious that these terms cannot be affirmed or denied (in logical phrase, predicated affirmatively or negatively) of any thing but themselves. A common term stands for many individuals (which are called its significates), as " man," " king." These, it is evident, can be said (or predicated) of others; e. g. "Caesar is a man," " Frederick is a king." The subject of a proposition, therefore {see Proposition), may be either a singular or a common term; the predicate must be a common term. Terms are said to be univocal, etjuivocal, analogous, .; but these are rather distinctions of language than of logic. They are also said to be " of the first intention," and " of the second intention; " the first appearing to be words used in a vague and general sense; the latter words used in a limited and specific sense, which they bear in some particular art or science. [s. 1236]