[səbˈtɛnd], (Verb)

Definitions:
- (of a line, arc, or figure) form (an angle) at a particular point when straight lines from its extremities are joined at that point
(e.g: the angle subtended by a string of length r at the centre of the sphere)

- (of a bract) extend under (a flower) so as to support or enfold it
(e.g: the main beauty is provided by the bracts which subtend the flowers)


Phrases:

Origin:
late 16th century (in subtend): from Latin subtendere, from sub- ‘under’ + tendere ‘stretch’. subtend dates from the late 19th century