os

noun

1. 1

   Synonym of bone.

   I was once, I remember, called to a Patient, who had received a violent Contuſion in his Tibia, by which the exterior Cutis was lacerated, ſo that there was a profuſe ſanguinary Diſcharge; and the interior Membranes were ſo divellicated, that the Os or Bone very plainly appeared through the Aperture of the Vulnus or Wound.

noun

1. 1

   An opening or entrance to a passage, particularly one at either end of the cervix, internal (to the uterus) or external (to the vagina).

   The instrument closed, as seen in Fig. 1, is then passed along the finger to the os, in and through the cervix up to the fundus of the uterus, which may be determined both by the distance and the resistance to the broad rounded head of the Capiat.

   […] monocolpate (“unisulcate”) pollen grains still have a continuous aperture membrane devoid of special openings (ora) in the exine for the emergence of the pollen tube.

noun

1. 1

   An osar or esker.

noun

1. 1

   Variant of o'srareAlternative form of o's.

Forms

plural

ossa, ora, osar