| oxidizer |
an oxidizing agent, esp. one that is used to power a rocket or fuel cell. |
| oximeter |
an instrument used to measure the degree of oxygen saturation of the blood. |
| oxlip |
a primrose bearing clusters of pale yellow flowers in early spring. |
| oxpecker |
either of two African birds, related to starlings, that feed on ticks living on the hides of large animals. |
| oxtail |
the tail of an ox, esp. when skinned and used as the main ingredient in soup or stew. |
| oxy-1 |
acute; sharp; pointed. |
| oxy-2 |
oxygen. |
| oxyacetylene |
relating to the combination of acetylene and oxygen in producing a high temperature flame for welding and cutting. |
| oxycephaly |
a condition in which the skull is somewhat peaked or conical, as the result of premature closing of the skull sutures. |
| oxygen |
a chemical element that has eight protons in each nucleus and that occurs in pure form, as a colorless, odorless gas essential to the respiration of living things, or in important compounds such as water, carbohydrates, and oxide minerals. (symbol: O) |
| oxygenate |
to combine, supply, or treat with oxygen. |
| oxygenless |
combined form of oxygen. |
| oxygen-starved |
of a living organism, deprived of an adequate oxygen supply. |
| oxygen tent |
a transparent, tentlike enclosure that is fitted around the head and shoulders of a bedridden patient to form a chamber into which oxygen can be released. |
| oxyhydrogen |
of or pertaining to a mixture of oxygen and hydrogen. [2 definitions] |
| oxymoron |
a figure of speech in which an apparent contradiction makes or highlights a point, as in the phrase "a frozen flame". |
| oxytocin |
a hormone produced by the pituitary gland that increases contractions of the uterus and stimulates milk production. |
| oyez |
hear ye! attention! (usu. called out three times by a court or public official to command silence before an official proclamation is made). |
| oyster |
any of various edible mollusks found chiefly in shallow water and characterized by a lumpy, irregular bi-valved shell, esp. the pearl oyster. [3 definitions] |
| oyster bed |
a place on the ocean floor where oysters naturally breed or one that is prepared for their cultivation. |
| oystercatcher |
any of several black and white shore birds having strong, reddish beaks with which they open and feed on bivalve mollusks such as oysters. |