AZOLE n.
, which may be regarded as derived respectively from furfuran, thiophene, and pyrrol by replacement of the CH group by nitrogen; as, furo-monazole. Names exactly analogous to those for the azines are also used; as, oxazole, diazole, etc.
BACK a. 3 definitions
ne) See under Pressure. -- Back rest, a guide attached to the slide rest of a lathe, and placed in contact with the work, to steady it in turning. -- Back slang, a kind of slang in which every word is written or pronounced backwards; as, nam for man. -- Back stairs, stairs in the back part of a house; private stairs…
BALL n.
-- formerly, the pupil of the eye. -- Ball valve (Mach.), a contrivance by which a ball, placed in a circular cup with a hole in its bottom, operates as a valve. -- Ball vein (Mining), a sort of iron ore, found in loose masses of a globular form, containing sparkling particles. -- Three balls, or Three golden balls,…