LUNA n.
r, or fused silver chloride, a tough, brown, translucent mass; -- so called from its resemblance to horn. Luna moth (Zoöl.), a very large and beautiful American moth (Actias luna). Its wings are delicate light green, with a stripe of purple along the front edge of the anterior wings, the other margins being edged with…
MORTAR n.
s, etc., at high angles of elevation, as 45º, and even higher; - - so named from its resemblance in shape to the utensil above described. Mortar bed (Mil.), a framework of wood and iron, suitably hollowed out to receive the breech and trunnions of a mortar. -- Mortar boat or vessel (Naut.), a boat strongly built and a…
OPERA n.
e Ginger family, sometimes seen in hothouses. It has curious flowers which have some resemblance to a ballet dancer, whence the popular name. Called also dancing girls. -- Opera glass, a short telescope with concave eye lenses of low power, usually made double, that is, with a tube and set of glasses for each eye; a l…