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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Mon 22nd April 2019