AFRICAN a.
Of or pertaining to Africa. African hemp, a fiber prerared from the leaves of the Sanseviera Guineensis, a plant found in Africa and India. -- African marigold, a tropical American plant (Tagetes erecta). -- African oak or African teak, a timber furnished by Oldfieldia Africana, used in ship building. African violet…
AMPHIBOLE n.
color and in composition. It occurs in monoclinic crystals; also massive, generally with fibrous or columnar structure. The color varies from white to gray, green, brown, and black. It is a silicate of magnesium and calcium, with usually aluminium and iron. Some common varieties are tremolite, actinolite, asbestus, ed…
AXIS n.
alley. -- Axis cylinder (Anat.), the neuraxis or essential, central substance of a nerve fiber; -- called also axis band, axial fiber, and cylinder axis. -- Axis in peritrochio, the wheel and axle, one of the mechanical powers. -- Axis of a curve (Geom.), a straight line which bisects a system of parallel chords of…