Lewis Short
fīlum (noun N.m) : i. n. (also , m., acc. to Arn. 1, 36 dub., plur.
* Heterocl., fili, Luc. 6, 460) [for figlum, v. figo], a thread of any thing woven (of linen or woolen cloth, a cobweb, etc.).
* Lit., Varr. L. L. 5, § 113 Müll.; Enn. ap. Non. 116, 6 (Ann. v. 259 ed. Vahl.); Verg. A. 6, 30; Ov. A. A. 3, 445; id. M. 4, 36; Mart. 6, 3, 5; Cels. 7, 16: lumen candelae cujus tempero filum,wick,Juv. 3, 287: tenuia aranei,a web,Lucr. 3, 383: tineae,Ov. M. 15, 372.—Poet., of the thread of life spun by the Fates: sororum fila trium,Hor. C. 2, 3, 16; Verg. A. 10, 815; Ov. M. 2, 654; id. Tr. 5, 10, 45; Sil. 4, 28; Mart. 10, 5, 10 al.— Prov.: pendere filo (tenui), to hang by a thread, for to be in great danger: hac noctu filo pendebit Etruria tota, Enn. ap. Macr. S. 1, 4, § 18 (Ann. v. 153 ed. Vahl.): omnia sunt hominum tenui pendentia filo,Ov. P. 4, 3, 35; Val. Max. 6, 4, 1.
* In partic., the fillet of wool wound round the upper part of the flamen's cap, similar to the στέμμα of the Greeks; hence, in gen., a priest's fillet: APICVLVM, filum, quo flamines velatum apicem gerunt, Paul. ex Fest. p. 23 Müll.: legatus capite velato filo (lanae velamen est), Audi, Juppiter, inquit, etc.,Liv. 1, 32, 6: filo velatus,Tib. 1, 5, 15.
* Trop. (cf. the preced. no.), of speech, texture, sort, quality, nature, style (class.): ego hospiti veteri et amico munusculum mittere (volui) levidense, crasso filo, cujusmodi ipsius solent esse munera,i. e. of coarse texture,Cic. Fam. 9, 12, 2; cf.: argumentandi tenue filum,id. Or. 36, 124: tenui deducta poëmata filo,Hor. Ep. 2, 1, 225; cf.: gracili connectere carmina filo, Col. poët. 10, 227: paulo uberiore filo,Cic. de Or. 2, 22, 93: orationis,id. ib. 3, 26, 103: aliud quoddam filum orationis tuae (= oratio uberior),id. Lael. 7, 25.
* Of any thing slender and drawn out like a thread, a string, cord, filament, fibre: tractat inauratae consona fila lyrae,the strings,Ov. Am. 1, 8, 60; so, lyrae,id. M. 5, 118: sonantia,id. ib. 10, 89: croci,i. e. the stamen,id. F. 1, 342: foliorum exilitas usque in fila attenuata,Plin. 21, 6, 16, § 30; 11, 15, 15, § 39.
* Plur., shreds, slices, remnants: fila sectivi porri,Juv. 14, 133: porris fila resecta suis,Mart. 11, 52: fila Tarentini graviter redolentia porri edisti,id. 13, 18.
* I. q. crassitudo, the density, compactness, compact shape, or, in gen., contour, form, shape of an object: forma quoque hinc solis debet filumque videri,Lucr. 5, 571, v. Lachm. ad h. 1.; cf. id. 5, 581; 2, 341; 4, 88: mulieris,Plaut. Merc. 4, 4, 15: corporis,Varr. L. L. 10, § 4 Müll.; Gell. 1, 9, 2; Amm. 14, 11, 28: forma atque filo virginali,id. 14, 4, 2: ingeniosus est et bono filo,Petr. 46.
Charlton T. Lewis, Charles Short, A Latin Dictionary