BALL n.
-- Ball cock, a faucet or valve which is opened or closed by the fall or rise of a ball floating in water at the end of a lever. -- Ball gudgeon, a pivot of a spherical form, which permits lateral deflection of the arbor or shaft, while retaining the pivot in its socket. Knight. -- Ball lever, the lever used in a b…
BARNACLE n.
Any cirriped crustacean adhering to rocks, floating timber, ships, etc., esp. (a) the sessile species (genus Balanus and allies), and (b) the stalked or goose barnacles (genus Lepas and allies). See Cirripedia, and Goose barnacle. Barnacle eater (Zoöl.), the orange filefish. -- Barnacle scale (Zoöl.), a bark louse (Ce…
BARREN a.
Mentally dull; stupid. Shak. Barren flower, a flower which has only stamens without a pistil, or which as neither stamens nor pistils. -- Barren Grounds (Geog.), a vast tract in British America northward of the forest regions. -- Barren Ground bear (Zoöl.), a peculiar bear, inhabiting the Barren Grounds, now believed…
BASEMENT n.
treated as a distinct substructure. ( See Base, n., 3 (a).) Hence: The rooms of a ground floor, collectively. Basement membrane (Anat.), a delicate membrane composed of a single layer of flat cells, forming the substratum upon which, in many organs, the epithelioid cells are disposed.