| Words | Parts of Speech | Meaning/Definition/Similar Words |
|---|---|---|
| osages | noun pl. | A tribe of southern Sioux Indians, now living in the Indian Territory. |
| osanne | noun | Hosanna. |
| oscine | adjective | Relating to the Oscines. |
| oscule | noun | One of the excurrent apertures of sponges. |
| oscula | plural | of Osculum |
| osiery | noun | An osier bed. |
| osiris | noun | One of the principal divinities of Egypt, the brother and husband of Isis. He was figured as a mummy wearing the royal cap of Upper Egypt, and was symbolized by the sacred bull, called Apis. Cf. Serapis. |
| osmate | noun | A salt of osmic acid. |
| osmite | noun | A salt of osmious acid. |
| osmium | noun | A rare metallic element of the platinum group, found native as an alloy in platinum ore, and in iridosmine. It is a hard, infusible, bluish or grayish white metal, and the heaviest substance known. Its tetroxide is used in histological experiments to stain tissues. Symbol Os. Atomic weight 191.1. Specific gravity 22.477. |
| osmose | noun | The tendency in fluids to mix, or become equably diffused, when in contact. It was first observed between fluids of differing densities, and as taking place through a membrane or an intervening porous structure. The more rapid flow from the thinner to the thicker fluid was then called endosmose, and the opposite, slower current, exosmose. Both are, however, results of the same force. Osmose may be regarded as a form of molecular attraction, allied to that of adhesion., The action produced by this tendency. |
| osmund | noun | A fern of the genus Osmunda, or flowering fern. The most remarkable species is the osmund royal, or royal fern (Osmunda regalis), which grows in wet or boggy places, and has large bipinnate fronds, often with a panicle of capsules at the top. The rootstock contains much starch, and has been used in stiffening linen. |
| osprey | noun | Alt. of Ospray |
| ospray | noun | The fishhawk. |
| ossean | noun | A fish having a bony skeleton; a teleost. |
| ossein | noun | The organic basis of bone tissue; the residue after removal of the mineral matters from bone by dilute acid; in embryonic tissue, the substance in which the mineral salts are deposited to form bone; — called also ostein. Chemically it is the same as collagen. |
| ossify | verb t. | To form into bone; to change from a soft animal substance into bone, as by the deposition of lime salts., Fig.: To harden; as, to ossify the heart., To become bone; to change from a soft tissue to a hard bony tissue. |
| osteal | adjective | Osseous. |
| ostein | noun | Ossein. |
| ostend | verb t. | To exhibit; to manifest. |
| ostent | noun | Appearance; air; mien., Manifestation; token; portent. |
| osteo- | A combining form of Gr. / a bone. | |
| ostium | noun | An opening; a passage. |
| ostler | noun | See Hostler. |
| ostmen | noun pl. | East men; Danish settlers in Ireland, formerly so called. |
| ostrea | noun | A genus of bivalve Mollusca which includes the true oysters. |