六鞭虫属：为双滴虫目(Diplomonadida)双滴虫亚目的一属长鞭毛原生动物，具有二个前核，六根前鞭毛和二根后鞭毛，自由生活或在肠道寄生。黑头六鞭虫(H.meleagridis)可引起火鸡、鸡、鹌鹑和鹧鸪等野禽及家禽严重肠炎，鼠六鞭虫(H.muris)见于大鼠、小鼠、仓鼠和多种野生啮齿动物，鲑六鞭虫(H.salmonis)，寄生于鳟与鲑类，鸽六鞭虫(H.columbae)寄生在鸽类- Klumpke's paralysis
- Kluyvera
- Klüver-Bucy syndrome
- km
- Km
- Knapp's forceps, operation, streaks(striae)
- Knapp's test
- kneading
- knee
- knee-gall
- kneippism
- Knemidokoptes
- knife
- knismogenic
- knitting
- knob
- knock
- knock-knee
- Knoepfelmacher's butter meal
- knot
- knuckle
- knuckling
- Kobelt's tubes, tubules
- Kober's test
- Kobert's test