| unguligrade | <zoology> Having, or walking on, hoofs. Origin: L. Ungula hoof + gradi to walk. Source: Websters Dictionary (01 Mar 1998) |
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| ungulous | <zoology> Same as Ungulate. See: Ungula. Source: Websters Dictionary (01 Mar 1998) |
| unhealth | Unsoundness; disease. Source: Websters Dictionary (01 Mar 1998) |
| unheart | To cause to lose heart; to dishearten. Origin: 1 st pref. Un- + heart. Source: Websters Dictionary (01 Mar 1998) |
| unhook | To loose from a hook; to undo or open by loosening or unfastening the hooks of; as, to unhook a fish; to unhook a dress. Origin: 1 st pref. Un- + hook. Source: Websters Dictionary (01 Mar 1998) |
| uni- | One, single, not paired; corresponds to G. Mono-. Origin: L. Unus (05 Mar 2000) |
| uniarticular | Relating to a single joint. Synonym: monarthric, uniarticular. (05 Mar 2000) |
| uniate | A member of the Greek Church, who nevertheless acknowledges the supremacy of the Pope of Rome; one of the United Greeks. Also used adjectively. Source: Websters Dictionary (01 Mar 1998) |
| uniaxial | 1. <chemistry> Having but one optic axis, or line of no double refraction. In uniaxial crystals, the optic axis has the direction of the vertical crystallographic axis. All tetragonal and hexagonal crystals are uniaxial. 2. <biology> Having only one axis; developing along a single line or plane; opposed to multiaxial. Origin: Uni + axial. Source: Websters Dictionary (01 Mar 1998) |
| uniaxial joint | One in which movement is around one axis only. (05 Mar 2000) |
| unibasal | Having but one base. (05 Mar 2000) |
| Uniblue A | A protein stain used in electrophoresis. (05 Mar 2000) |
| unibranchiate | <zoology> Having but one gill, as certain molluscs. Origin: Uni- + branchiate. Source: Websters Dictionary (01 Mar 1998) |
| unicameral | Having one cavity or chamber. Synonym: unicameral, unicamerate. Origin: mono-+ L. Loculus, a small place (05 Mar 2000) |
| unicameral bone cyst | A unilocular cyst containing serous fluid and lined with a thin layer of connective tissue, occurring usually in the shaft of a long bone in a child. Synonym: idiopathic bone cavity, osteocystoma, simple bone cyst, traumatic bone cyst, unicameral bone cyst. (05 Mar 2000) |