element Copy link Outline I. A first principle, constituent part1. ĕlĕmentum2. (only in pl.) princĭpia rerum, Cic.; who adds, e quibus omnia constant, Acad. 2, 36, fin.3. ĭnĭtia, orum (also only pl.)4. prīmordia, orum (also only pl.)II. Of a science or art1. princĭpia, ōrum (first principles), Cic.2. ĕlĕmenta, ōrum3. prīmordia, ōrum4. rŭdīmenta, ōrumIII. Proper region or field • element: I. A first principle, constituent part: 1. ĕlĕmentum: those are called first principles, and to translate from the Greek e.s, illa initia (ἀρχαί), et ut e Graeco vertam elementa, Cic. Acad. 1, 7, 26: also used in sing., Plin. 2. (only in pl.) princĭpia rerum, Cic.; who adds, e quibus omnia constant, Acad. 2, 36, fin. 3. ĭnĭtia, orum (also only pl.): v. supr. 1. 4. prīmordia, orum (also only pl.): to unite the e.s in pairs, conduplicare pr. rerum, Lucr. 1, 713: it is the term most freq. used by Lucr. of his elemental atoms, 1, 815, etc. Phr.: to be formed out of four e.s, quatuor ex rebus creari, Lucr.: (Thales) affirmed water to be the one primary e., ex aqua dixit constare omnia, Cic. Acad. 2, 37: (the Pythagoreans) make numbers and mathematical principles to be the primary e.s, ex numeris et mathematicorum initiis proficisci volunt omnia, Cic. l. c. II. Of a science or art: in pl. only: 1. princĭpia, ōrum (first principles), Cic.: v. principles. 2. ĕlĕmenta, ōrum: the e.s of speaking, e. loquendi, Cic. Acad. 2, 28, fin.: Quint. 3. prīmordia, ōrum: the e.s of speaking, pr. dicendi, Quint. 4. rŭdīmenta, ōrum: v. rudiments. III. Proper region or field: Phr.: to be out of one's e. in anything, peregrinum atque hospitem in aliqua re esse, Cic. de Or. 1, 50, fin.: to move freely, and as if in its own element, libere ac solute [quasi in proprio suo campo] moveri, cf. Cic. Div. 2, 48, 100.