| xerasia | A condition of the hair characterised by dryness and brittleness. Origin: G. Xerasia, fr. Xeros, dry (05 Mar 2000) |
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| xeric | <ecology> Characterised by a scanty supply of moisture, tolerating, or adapted to, arid conditions. (09 Oct 1997) |
| xero- | Dry. Origin: G. Xeros (05 Mar 2000) |
| xerochilia | Dryness of lips. Origin: xero-+ G. Cheilos, lip (05 Mar 2000) |
| xeroderma | <medicine> Ichthyosis. A skin disease characterised by the presence of numerous small pigmented spots resembling freckles, with which are subsequently mingled spots of atrophied skin. Origin: NL, fr. Gr. Dry + skin. Source: Websters Dictionary (01 Mar 1998) |
| xeroderma pigmentosum | <disease> A rare inherited (autosomal recessive) disease in humans associated with increased sensitivity to ultraviolet induced mutagenesis and thus skin cancer. Sensitivity can be demonstrated in cultured cells and appears to be due to deficiency in DNA repair, specifically in excision of ultraviolet induced thymine dimers. Afflicted individuals are extremely sensitive to light and develop eye and skin abnormalities such as premature aging, keratoses and skin cancers and must be kept completely away from UV light. Inheritance: autosomal recessive. (18 Nov 1997) |
| xerogram | The permanent record made by xeroradiography. Synonym: xerogram. (05 Mar 2000) |
| xerography | A photoelectric method of recording an X-ray image on a coated metal plate, using low-energy photon beams, long exposure time and dry chemical developers. (12 Dec 1998) |
| xeroma | <disease> A dryness of the conjunctiva and cornea due to vitamin A deficiency. The condition begins with night blindness and conjunctival xerosis and progresses to corneal xerosis, and, in the late stages, to keratomalacia. (18 Nov 1997) |
| xeromammography | Xeroradiography of the breast. (12 Dec 1998) |
| xeromenia | An obsolete term for occurrence of the usual constitutional symptoms at the menstrual period without any show of blood. Origin: xero-+ G. Meniaia, menses (05 Mar 2000) |
| xeromorph | <botany> A plant having structural features usually associated with plants of arid habitats (such as hard or succulent leaves) but not necessarily drought-tolerant. Compare: scleromorph, xerophyte. (09 Oct 1997) |
| xeromycteria | Extreme dryness of the nasal mucous membrane. Origin: xero-+ G. Mykter, the nose (05 Mar 2000) |
| xeronate | <chemistry> A salt of xeronic acid. Source: Websters Dictionary (01 Mar 1998) |
| xeronic | <chemistry> Pertaining to, or designating, an acid, C8H12O4, related to fumaric acid, and obtained from citraconic acid as an oily substance having a bittersweet taste; so called from its tendency to form its anhydride. Origin: Gr. Dry + citraconic. Source: Websters Dictionary (01 Mar 1998) |