| OSTENTS | • ostents n. Plural of ostent. • OSTENT v. to show off. |
| OSTEOID | • osteoid adj. Of, pertaining to, or characteristic of bone; bonelike. • osteoid n. An organic matrix of protein and polysaccharides, secreted by osteoblasts, that becomes bone after mineralization. • OSTEOID n. an uncalcified bone matrix. |
| OSTEOMA | • osteoma n. (Medicine, pathology) A benign bony tumour that typically grows on the skull. • OSTEOMA n. (Greek) a tumor composed of bone or bone-like tissue. |
| OSTIARY | • ostiary n. The mouth of a river; an estuary. • ostiary n. One who keeps the door, especially the door of a church; a porter. • OSTIARY n. a doorkeeper at a church. |
| OSTIATE | • OSTIATE adj. having an ostium (a mouthlike opening). |
| OSTIOLE | • ostiole n. (Mycology) A small hole or opening through which certain fungi release their mature spores. • ostiole n. (Botany) A similar hole or opening in plants, such as the opening of the involuted fig inflorescence… • OSTIOLE n. a small bodily opening. |
| OSTLERS | • ostlers n. Plural of ostler. • OSTLER n. a horse tender at an inn. |
| OSTMARK | • ostmark n. (Historical) The currency unit of the former German Democratic Republic (aka GDR, DDR, East Germany)… • OSTMARK n. (German) a former East German monetary unit. |
| OSTOSES | • OSTOSIS n. the formation of bone. |
| OSTOSIS | • ostosis n. (Physiology) bone formation; ossification. • OSTOSIS n. the formation of bone. |
| OSTRACA | • ostraca n. Plural of ostracon. • OSTRACON n. (Greek) a piece of tile for writing a message upon, also OSTRAKON. |
| OSTRAKA | • ostraka n. Plural of ostrakon. • OSTRAKON n. (Greek) a piece of tile for writing a message upon, also OSTRACON. |
| OSTRICH | • ostrich n. (Ornithology) A large flightless bird of the genus Struthio. • ostrich n. (Figurative) One who buries one’s head in the sand instead of acknowledging problems. • ostrich n. (Golf) The hypothetical completion of a hole five strokes under par (a quintuple birdie, quadruple eagle… |