Lewis & Short

trāma, ae, f. [cf.: trans, trāmes].

  1. I. Lit., the woof, weft, or filling of a web (cf. subtemen), Varr. L. L. 5, § 113 Müll.; Sen. Ep. 90, 20; Isid. 19, 22, 14 al.
    Of a spider’s web: ipsa per se tenax ratio tramae, Plin. 11, 24, 28, § 81.
  2. II. Transf.: figurae, i. e. a thin, lank figure, Pers. 6, 73: putridae, i. e. trifles, bagatelles, Plaut. Rud. 5, 2, 37.