| orzo |
pasta resembling grains of rice. |
| Os |
symbol of the chemical element osmium. |
| os1 |
a bone. |
| os2 |
a mouth; opening; aperture. |
| Osage orange |
a small thorny tree of the mulberry family, native to the midwestern United States, that is often used in hedgerows. [2 definitions] |
| Osaka |
a large port city in southern Honshu, Japan. |
| Oscar |
see "Academy Award." [2 definitions] |
| Óscar Romero |
El Salvadoran Roman Catholic priest who was assassinated in retaliation for his social and political activity; born Óscar Arnulfo Romero y Galdámez (b.1917--d.1980). |
| oscillate |
to swing steadily and repeatedly back and forth. [4 definitions] |
| oscillation |
the action or fact of oscillating. [2 definitions] |
| oscillograph |
an oscilloscope that records the wave forms representing changes in currents, voltages, or other electrical quantities. |
| oscilloscope |
an instrument for depicting variations in an electrical quantity as a wave or trace on a viewing screen. |
| oscine |
of or relating to a large group of passerine birds with highly developed vocal cords. [2 definitions] |
| osculant |
of an organism, sharing the characteristics of two closely related taxonomic groups. |
| oscular |
of or relating to the mouth or to kissing. [2 definitions] |
| osculate |
to be tangent; touch. [2 definitions] |
| osculum |
any of the small openings of a sponge through which water is expelled. |
| -ose1 |
having the characteristics of; resembling or abounding in. |
| -ose2 |
a carbohydrate, esp. a sugar. |
| OSHA |
acronym of "Occupational Safety and Health Administration." |
| osier |
any of several willows with long, flexible twigs used in basketry and wickerwork, or the twig of such a plant. |