a white to gray, brittle mineral, antimony arsenide, AsSb, occurring in reniform masses: formerly used as an ore of arsenic.
- Allen park
a city in SE Michigan.
- Allen key
noun an L-shaped tool consisting of a rod having a hexagonal cross section, used to turn a screw (Allen screw) with a hexagonal recess in the head. A different size of key is required for each size of screw noun a hex head spanner designed to fit into and turn an Allen screw; also known […]
- Allen screw
a screw turned by means of an axial hexagonal hole in its head.
- Allen test
allen test Allen test n. A test for occlusion of the radial or ulnar artery, in which one of these arteries is compressed after blood has been forced out of the hand by clenching it into a fist; failure of the blood to diffuse into the hand when opened indicates that the artery not compressed […]