| xysma | Membranous shreds in the faeces. Origin: G. Filings, shavings, fr. Xyo, to scrape (05 Mar 2000) |
|---|---|
| xyster | <instrument> A file-like surgical instrument for scraping bone and other firm tissues. (15 Nov 1997) |
| xyy karyotype | Abnormal genetic constitution in males characterised by an extra y chromosome. (12 Dec 1998) |
| XYY male | See: XYY syndrome. (05 Mar 2000) |
| XYY syndrome | <syndrome> A chromosomal anomaly with chromosome count 47, with a supernumerary Y chromosome; controversial evidence associates tallness, aggressiveness, and acne with this condition. (05 Mar 2000) |