| Oro | 1. Symbol for orotic acid or orotate. 2. <prefix> relating to the mouth. Origin: L. Os, oris, mouth (05 Mar 2000) |
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| oroantral fistula | <dentistry> A fistula between the maxillary sinus and the oral cavity, sometimes through the tooth socket. (12 Dec 1998) |
| orodigitofacial | <anatomy> Relating to the mouth, fingers, and face. (05 Mar 2000) |
| orodigitofacial dysostosis | <syndrome> An inherited syndrome, lethal in males, with varying combinations of defects of the oral cavity, face, and hands, including lobulated or bifid tongue, cleft or pseudocleft palate, tongue tumours, missing or malpositioned teeth, hypoplastic nasal alar cartilage, depressed nasal bridge, brachydactyly, clinodactyly, incomplete syndactyly, and, frequently, mental retardation. There are two subtypes recognised. Type I (papillon-leage and psaume syndrome, gorlin-psaume syndrome) is inherited as an x-linked dominant trait and is found only in females and XXY males. Type II (mohr syndrome) is inherited as an autosomal recessive trait. Inheritance: autosomal recessive and X-linked. Synonym: OFD syndrome, orofaciodigital syndrome, Papillon-Leage and Psaume syndrome. (05 Mar 2000) |
| orofacial | <anatomy> Of or relating to the mouth and face. (18 Nov 1997) |
| orofacial fistula | <dentistry> A pathologic communication between the cutaneous surface of the face and the oral cavity. (05 Mar 2000) |
| orofaciodigital syndrome | <syndrome> An inherited syndrome, lethal in males, with varying combinations of defects of the oral cavity, face, and hands, including lobulated or bifid tongue, cleft or pseudocleft palate, tongue tumours, missing or malpositioned teeth, hypoplastic nasal alar cartilage, depressed nasal bridge, brachydactyly, clinodactyly, incomplete syndactyly, and, frequently, mental retardation. There are two subtypes recognised. Type I (papillon-leage and psaume syndrome, gorlin-psaume syndrome) is inherited as an x-linked dominant trait and is found only in females and XXY males. Type II (mohr syndrome) is inherited as an autosomal recessive trait. Inheritance: autosomal recessive and X-linked. Synonym: OFD syndrome, orofaciodigital syndrome, Papillon-Leage and Psaume syndrome. (05 Mar 2000) |
| orographic | Of or pertaining to orography. Source: Websters Dictionary (01 Mar 1998) |
| orographical | Of or pertaining to orography. Source: Websters Dictionary (01 Mar 1998) |
| orography | <study> That branch of science which treats of mountains and mountain systems; orology; as, the orography of Western Europe. Origin: Gr. A mountain. Source: Websters Dictionary (01 Mar 1998) |
| orohippus | <paleontology> A genus of American Eocene mammals allied to the horse, but having four toes in front and three behind. Origin: NL, fr. Gr. Mountain (referring to the Rocky Mountain region) + horse. Source: Websters Dictionary (01 Mar 1998) |
| orolingual | Relating to the mouth and tongue. (05 Mar 2000) |
| orological | Of or pertaining to orology. Origin: Cf. F. Orologique. Source: Websters Dictionary (01 Mar 1998) |
| orologist | One versed in orology. Source: Websters Dictionary (01 Mar 1998) |
| orology | <study> The science or description of mountains. Origin: Gr. Mountain: cf. F. Orologie. Source: Websters Dictionary (01 Mar 1998) |