| orthosympathetic | Referring to the sympathetic component of the autonomic nervous system, as distinguished from parasympathetic. See: autonomic nervous system. (05 Mar 2000) |
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| orthotic devices | Apparatus used to support, align, prevent, or correct deformities or to improve the function of movable parts of the body. (12 Dec 1998) |
| orthotics | The science concerned with the making and fitting of orthopaedic appliances. Synonym: orthetics. (05 Mar 2000) |
| orthotist | A maker and fitter of orthopaedic appliances. (05 Mar 2000) |
| orthotolidine | O-Tolidine; 3,3'-dimethylbenzidine;in the presence of peroxidase, orthotolidine (like benzidine) is oxidised to a blue colour; since haemoglobin behaves like a peroxidase, orthotolidine has been used as an in vitro aid for the detection of occult blood in faeces. (05 Mar 2000) |
| orthotomic | <geometry> Cutting at right angles. <geometry> Orthotomic circle, that circle which cuts three given circles at right angles. Origin: Ortho- + Gr. To cleave. Source: Websters Dictionary (01 Mar 1998) |
| orthotomous | <chemistry> Having two cleavages at right angles with one another. Source: Websters Dictionary (01 Mar 1998) |
| orthotomy | <geometry> The property of cutting at right angles. Source: Websters Dictionary (01 Mar 1998) |
| orthotonos | Orthotonus A form of tetanic spasm in which the neck, limbs, and body are held fixed in a straight line. Origin: ortho-+ G. Tonos, tension (05 Mar 2000) |
| orthotopic | In the normal or usual position. Origin: ortho-+ G. Topos, place (05 Mar 2000) |
| orthotopic graft | Transplantation of a tissue or organ into its normal anatomical position. (05 Mar 2000) |
| orthotropic | <botany> Having the longer axis vertical; said of erect stems. See: Orthotropal. Source: Websters Dictionary (01 Mar 1998) |
| orthotropous | <cell biology> Of an ovule, erect so that the micropyle points away from the placenta. (09 Oct 1997) |
| orthovoltage | In radiation therapy, a vague term for voltage between 400 and 600 kv. (05 Mar 2000) |
| orthoxylene | <chemistry> That variety of xylene in which the two methyl groups are in the ortho position; a colourless, liquid, combustible hydrocarbon resembling benzene. Origin: Ortho- + xylene. Source: Websters Dictionary (01 Mar 1998) |