/ˈflekSHər/
Noun, pl. flexures
1. The act of bending or flexing; flexion. (wiktionary.org)
2. (Anatomy)
a. A curve or bend in a tubular organ. (wiktionary.org)
b. Act of bending a joint; especially a joint between the bones of a limb so that the angle between them is decreased. (wordnetweb.princeton.edu)
3. (Zoology) The last joint, or bend, of the wing of a bird. (wiktionary.org)
4. (Astronomy) The small distortion of an astronomical instrument caused by the weight of its parts; the amount to be added or subtracted from the observed readings of the instrument to correct them for this distortion. (biology-online.org)
5. (Mathematics) The flexure of a curve, the bending of a curve towards or from a straight line. (biology-online.org)