MASON n.
Mason shell (Zoöl.), a marine univalve shell of the genus Phorus; -- so called because it cements other shells and pebbles upon its own shell; a carrier shell. -- Mason wasp (Zoöl.), any wasp that constructs its nest, or brood cells, of hardened mud. The female fills the cells with insects or spiders, paralyzed by a s…
MASTIC n.
A kind of cement composed of burnt clay, litharge, and linseed oil, used for plastering walls, etc. Barbary mastic (Bot.), the Pistachia Atlantica. -- Peruvian mastic tree (Bot.), a small tree (Schinus Molle) with peppery red berries; -- called also pepper tree. -- West Indian mastic (Bot.), a lofty tree (Bursera gum…
MEND v.
orn, broken, defaced, decayed, or the like; to restore from partial decay, injury, or defacement; to patch up; to put in shape or order again; to re-create; as, to mend a garment or a machine.
METATHESIS n.
The act, process, or result of exchange, substitution, or replacement of atoms and radicals; thus, by metathesis an acid gives up all or part of its hydrogen, takes on an equivalent amount of a metal or base, and forms a salt.
MORTAR n.
A building material made by mixing lime, cement, or plaster of Paris, with sand, water, and sometimes other materials; -- used in masonry for joining stones, bricks, etc., also for plastering, and in other ways. Mortar bed, a shallow box or receptacle in which mortar is mixed. -- Mortar board. (a) A small square board…