Or"bit*al (?), a. Of or pertaining to an orbit. "Orbital revolution."
J. D. Forbes.
Orbital index (Anat.), in the skull, the ratio of the vertical height
to the transverse width of the orbit, which is taken as the standard,
equal to 100.
Or"bit*ar (?), a. [Cf. F. orbitaire.] Orbital. [R.] Dunglison.
Or"bit*a*ry (?), a. Situated around the orbit; as, the orbitary
feathers of a bird.
||Or`bi*te"læ (?), n. pl. [NL., fr. L. orbis an orb + tela a web.]
||(Zoöl.) A division of spiders, including those that make geometrical
||webs, as the garden spider, or Epeira.
||Or`bi*to*li"tes (?), n. [NL. See Orbit, and -lite.] (Zoöl.) A genus
||of living Foraminifera, forming broad, thin, circular disks,
||containing numerous small chambers.
Or`bi*to*na"sal (?), a. [Orbit + nasal.] (Anat.) Of or pertaining to
the orbit and the nose; as, the orbitonasal, or ophthalmic, nerve.
Or`bi*to*sphe"noid (?), a. [Orbit + sphenoid.] (Anat.) Of or pertaining
to the sphenoid bone and the orbit, or to the orbitosphenoid bone. --
n. The orbitosphenoid bone, which is situated in the orbit on either
side of the presphenoid. It generally forms a part of the sphenoid in
the adult.
Or`bi*to*sphe*noid"al (?), a. (Anat.) Of or pertaining to the
orbitosphenoid bone; orbitosphenoid.