ut ūna castra iam facta ex bīnīs vidērentur, Caes. C. 1, 74, 4, so that one camp seemed now to have been formed out of two. trīnīs catēnīs vinctus, 1, 53, 5, in triple irons. Similarly with things in pairs, as: bovēs bīnī, Pl. Pers. 317, a yoke of oxen.

[2422.] Poets sometimes use the singular of distributives: as, centēnāque arbore flūctum verberat, V. 10, 207, and with a hundred beams at every stroke the wave he smites. duplicī nātūrā et corpore bīnō, Lucr. 5, 879, twynatured and of body twain. The plural is sometimes used in verse for the cardinal: centum bracchia . . . centēnāsque manūs, V. 10, 565, a hundred arms . . . and hundred hands.

[Other Numerals.]

[2423.] Other numerical adjectives are multiplicatives, ending in -plex; they are: simplex, onefold, simple, sēscuplex, one and a half fold, duplex, triplex, quadruplex, quīncuplex, septemplex, decemplex, centuplex; and proportionals, used mostly in the neuter as substantives: duplus, twice as great, triplus, three times as great, quadruplus, septuplus, octuplus. Besides these there are other adjectives derived from numerals: as, prīmānus, soldier of the first: prīmārius, first rate: bīmus, twinter, two-year-old; &c., &c.

[Expression of Fractions.]

[2424.] One half may be expressed by dīmidium or dīmidia pars; other fractions with 1 as a numerator by ordinals, with or without pars: as, tertia pars or tertia, 1/3.

[2425.] If the numerator is greater than 1 it is usually expressed by the cardinal feminine, with the ordinal feminine for the denominator: as, duae septimae, 2/7. But besides these forms there are others, namely:

[2426.] (1.) Fractions with a numerator less by 1 than the denominator, except 1/2, may be expressed by cardinals with partēs, as, duae partēs, 2/3; trēs partēs, 3/4; quattuor partēs, 4/5.

[2427.] (2.) Fractions with 12 or its multiples as a denominator are expressed in business language by the parts of an ās: thus,

1/12,uncia
1/6,sextāns
1/4,quadrāns
1/3,triēns
5/12,quīncunx
1/2,sēmis
7/12,septunx
2/3,bēs
3/4,dōdrāns
5/6,dēxtāns
11/12,deūnx
12/12,ās