Orthopinacoid
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.[1913 Webster]
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Or`thop*n"a
(?),Or*thop"ny
(?), } n. [L. orthopnoea, Gr. ; 'orqo`sstraight, right + pnei^n to breathe: cf. F. orthopne.] (Med.) Specifically, a morbid condition in which respiration can be performed only in an erect posture; by extension, any difficulty of breathing.[1913 Webster]
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Tue 19th January 2021