Meaning of curvilinear tracery

curvilin'ear trac'ery

Pronunciation: [key]
— Archit. Archit.
  1. tracery, esp. of the 14th and 15th centuries, characterized by a pattern of irregular, boldly curved forms. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.