(Or*thop"e*dy) n. [Ortho- + Gr. a child.] (Med.) The art or practice of curing the deformities
of children, or, by extension, any deformities of the human body.
(Or*thoph"o*ny) n. [Ortho- + Gr. voice.] The art of correct articulation; voice training.
(Or`tho*pin"a*coid) n. [Ortho- + pinacoid.] (Crystallog.) A name given to the two planes
in the monoclinic system which are parallel to the vertical and orthodiagonal axes.
(||Or`thop*n"a Or*thop"ny) n. [L. orthopnoea, Gr. 'orqo`sstraight, right + pnei^n to breathe: cf.
F. orthopnée.] (Med.) Specifically, a morbid condition in which respiration can be performed only in an
erect posture; by extension, any difficulty of breathing.
(||Or*thop"o*da) n. pl. [NL. See Ortho-, and -poda.] (Zoöl.) An extinct order of reptiles
which stood erect on the hind legs, and resembled birds in the structure of the feet, pelvis, and other
(Or"tho*prax`y) n. [Gr. 'orqo`s straight + a doing.] (Med.) The treatment of deformities in
the human body by mechanical appliances.
(||Or*thop"te*ra) n. pl. [NL., fr. Gr. 'orqo`s straight + feather, wing.] (Zoöl.) An order of
mandibulate insects including grasshoppers, locusts, cockroaches, etc. See Illust. under Insect.
The anterior wings are usually thickened and protect the posterior wings, which are larger and fold longitudinally
like a fan. The Orthoptera undergo no metamorphosis.