IMPOSTHUME.—An imposthume is that kind of inflammatory enlargement, or swelling, which terminates in a formation of matter, produced by an effort of Nature to relieve herself from some offending morbidity under which she labours. Its progress will be found under the head ABSCESS, with which it is synonymous, and where the danger of attempting repulsion is fully explained. IMPERFECTIONS.—The term, so far as it is applied to horses, implies little more than what is to be seen under the different heads of BLEMISHES and DEFECTS. A horse may be very found, handsome, and valuable, yet he may have _imperfections_ not arising from, or originating in, _blemishes_; as well as not amounting to what is meant to be conveyed by the idea of _defects_. Imperfections may be considered as slight drawbacks upon excellence, which, although they do not very considerably reduce the intrinsic value of the horse, yet he would be much better without them; as warmth or violence of temper, when put into action with any other horse in company; shying or starting, either in meeting or passing a carriage; uneasy and restless in mounting or dismounting; aukwardness in the gait of any particular leg, although it may not impede the velocity of action. INJECTIONS.—Many medical solutions and lotions are so called; though the word more properly applies only to such compositions as are prepared solely for the purpose of being conveyed by means of an instrument, called a long-necked syringe, (formed of either ivory or pewter,) into such remote cavities, or sinuses, as may be formed by accident, imposthume, or disease, in any part of the body. INTERFERE.—A horse was formerly said to interfere, when one fetlock-joint received an injury in action, by a _cut_ or _blow_ from the foot of the other leg. The term, however, is completely out of use; and a horse subject to this defect is now said to cut. See CUTTING. JOCKEY.—This term, in its particular and most confined signification, implies the person who actually rides a horse for PLATE, MATCH, SUBSCRIPTION, SWEEPSTAKES, or any other PRIZE; but custom and provincial forms have been productive of local deviations. To say in one district, that any man is "_a good jockey_," means no more, than that he is a good HORSEMAN. In another, to say he is "quite A JOCKEY," is to communicate an idea, that he is very little, _if any_, better than a swindler, and exceedingly well qualified to _jockey_ any person with whom he has a trading transaction. HORSE-DEALERS, till within the last half century, passed under the regular denomination of _jockies_ in every market town and country fair in the kingdom; from which indefinite description they are now relieved by the kind intention of his Majesty's Ministers, who have since STAMPED them with a _badge_ of professional dignity, and enjoined an annual pecuniary contribution for the distinction.