anfractuous (full of twists and turns; tortuous)
chamfer (to cut off the edge or corner of; bevel)
defray (to undertake the payment of [costs or expenses]; pay)
diffraction (change in the directions and intensities of a group of waves after passing by an obstacle or through an aperture)
fractal (a geometric pattern that is repeated at ever smaller scales to produce irregular shapes and surfaces that cannot be represented by classical geometry; fractals are used especially in computer modeling of irregular patterns and structures in nature)
fraction (an expression that indicates the quotient of two quantities; a disconnected piece; a fragment)
fracture (the act or process of breaking)
fragile (easily broken, damaged, or destroyed; frail)
fragment (a small part broken off or detached)
frail (physically weak; delicate; not strong or substantial; slight; easily broken or destroyed; fragile)
frangible (capable of being broken; breakable)
infrangible (difficult or impossible to break or separate into parts)
infringe (to transgress or exceed the limits of; violate)
ossifrage (a large predatory bird (Gypaetus barbatus) of the vulture family, ranging from the mountainous regions of southern Europe to China and having a wide wingspan and black plumage)
refract (to deflect [light, for example] from a straight path by refraction)
saxifrage (any of numerous herbs of the genus Saxifraga, having small, variously colored flowers and leaves that often form a basal rosette...found growing in rock crevices)
septifragal (dehiscing by the breaking away of the valves from its partitions; used of a seed capsule)
Definitions are taken from:
The American Heritage® Dictionary of the English Language, Third Edition copyright © 1992 by Houghton Mifflin Company.
Electronic version licensed from InfoSoft International, Inc. All rights reserved.
Webster's Third New International Dictionary, Unabridged. Merriam-Webster, 2002.
http://unabridged.merriam-webster.com (30 Sep. 2006).
English-Word Information: Word Info about English Vocabulary (wordinfo.info).