| OAW | oral airways |
|---|---|
| OC | obstetrical conjugate; occlusocervical; office call; on call; only child; optic chiasma; oral contra... |
| OCA | oculocutaneous albinism; olivopontocerebellar atrophy; oral contraceptive agent |
| OCC | object-centered coordinate [method]; oral cholecystography |
| OCG | omnicardiogram; oral cholecystogram |
| water bird | <zoology> Any aquatic bird; a water fowl. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| water blackbird | <zoology> The European water ousel, or dipper. Source: Websters Dictionary (01 Mar 1998) |
| water boatman | <zoology> A boat bug. Source: Websters Dictionary (01 Mar 1998) |
| water brain | A disease of sheep; gid. Source: Websters Dictionary (01 Mar 1998) |
| water brash | <medicine> See Brash. Source: Websters Dictionary (01 Mar 1998) |
| water breather | <zoology> Any arthropod that breathes by means of gills. Source: Websters Dictionary (01 Mar 1998) |
| water buck | <zoology> A large, heavy antelope (Kobus ellipsiprymnus) native of Central Africa. It frequents the banks of rivers and is a good swimmer. It has a white ring around the rump. Called also photomok, water antelope, and waterbok. The name is also applied to other related species, as the leche (Kobus leche), which has similar habits. Source: Websters Dictionary (01 Mar 1998) |
| water buffalo | <zoology> The European buffalo. Source: Websters Dictionary (01 Mar 1998) |
| water bug | <zoology> The Croton bug. Any one of numerous species of large, rapacious, aquatic, hemipterous insects belonging to Belostoma, Benacus, Zaitha, and other genera of the family Belostomatidae. Their hind legs are long and fringed, and act like oars. Some of these insects are of great size, being among the largest existing Hemiptera. Many of them come out of the water and fly about at night. Source: Websters Dictionary (01 Mar 1998) |
| water caltrop | <botany> The water chestnut. Source: Websters Dictionary (01 Mar 1998) |
| water can | <botany> Any one of several species of Nuphar; the yellow frog lily; so called from the shape of the seed vessel. See Nuphar, and cf. Candock. Source: Websters Dictionary (01 Mar 1998) |
| water canker | <medicine> See Canker. Source: Websters Dictionary (01 Mar 1998) |
| water cavy | <zoology> The capybara. Source: Websters Dictionary (01 Mar 1998) |
| water celery | <botany> A very acrid herb (Ranunculus sceleratus) growing in ditches and wet places. Synonym: cursed crowfoot. Source: Websters Dictionary (01 Mar 1998) |
| water cell | <zoology> A cell containing water; specifically, one of the cells or chambers in which water is stored up in the stomach of a camel. Source: Websters Dictionary (01 Mar 1998) |