Illustrated Companion to the Latin Dictionary/Ruga

This article incorporates text from a publication now in the public domain: Rich, Anthony (1849). The illustrated companion to the Latin dictionary, and Greek lexicon. p. vi. OCLC 894670115. https://archive.org/details/illustratedcompa00rich. 

RU'GA (ῥυτίς). Literally, a wrinkle; whence, the worm of a screw (Plin. H. N. xviii. 74. and COCHLEA), and a small irregular crease or fold in a piece of drapery, and contradistinguished from sinus, a deep and loose one, and from contabulatio, a straight and regular one. Plin. H. N. xxxv. 34. Macrob. Sat. ii. 9. and woodcuts s. CONTABULATIO and SINUS.