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Or*thog"a*my (?), n. [Ortho- +
Gr. &?; marriage.] (Bot.) Direct fertilization in plants,
as when the pollen fertilizing the ovules comes from the stamens of
the same blossom; -- opposed to heterogamy.

Or`thog*nath"ic (?), a.
Orthognathous.

Or*thog"na*thism (?), n. (Anat.)
The quality or state of being orthognathous.
Huxley.

Or*thog"na*thous (?), a. [Ortho-
+ Gr. &?; the jaw.] (Anat.) Having the front of the head,
or the skull, nearly perpendicular, not retreating backwards above
the jaws; -- opposed to prognathous. See Gnathic index,
under Gnathic.

Or"tho*gon (?), n. [Ortho- + Gr.
&?; angle: cf. F. orthogone, a.] (Geom.) A
rectangular figure.

Or*thog"o*nal (?), a. [Cf. F.
orthogonal.] Right-angled; rectangular; as, an
orthogonal intersection of one curve with another.

Orthogonal projection. See under
Orthographic.


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