| embolus | A clot formed by platelets or leucocytes that blocks a blood vessel. (18 Nov 1997) |
|---|---|
| rider | 1. One who, or that which, rides. 2. Formerly, an agent who went out with samples of goods to obtain orders; a commercial traveler. 3. One who breaks or manages a horse. 4. An addition or amendment to a manuscript or other document, which is attached on a separate piece of paper; in legislative practice, an additional clause annexed to a bill while in course of passage; something extra or burdensome that is imposed. "After the third reading, a foolish man stood up to propose a rider." (Macaulay) "This [question] was a rider which Mab found difficult to answer." (A. S. Hardy) 5. <mathematics> A problem of more than usual difficulty added to another on an examination paper. 6. [D. Rijder] A Dutch gold coin having the figure of a man on horseback stamped upon it. "His moldy money ! half a dozen riders." (J. Fletcher) 7. <chemical> Rock material in a vein of ore, dividing it. 8. An interior rib occasionally fixed in a ship's hold, reaching from the keelson to the beame of the lower deck, to strengthen her frame. 9. The second tier of casks in a vessel's hold. 10. A small forked weight which straddles the beam of a balance, along which it can be moved in the manner of the weight on a steelyard. 11. A robber. <medicine> Rider's bone, a bony deposit in the muscles of the upper and inner part of the thigh, due to the pressure and irritation caused by the saddle in riding. Source: Websters Dictionary (01 Mar 1998) |
| rider's bone | Heterotopic bone ossification of the tendon of the adductor longus muscle from strain in horseback riding. Synonym: cavalry bone, exercise bone. (05 Mar 2000) |
| rider's bursa | <anatomy> An adventitious bursa on the inner side of the knee caused by horseback riding. (05 Mar 2000) |
| rider's leg | A strain of the adductor muscles of the thigh. (05 Mar 2000) |
| rider's muscles | The adductor muscle's of the thigh, which come into play especially in horseback riding. (05 Mar 2000) |