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1. a male parent, esp of a horse or other domestic animal
2. a respectful term of address, now used only in addressing a male monarch



in animal breeding, a male (bull, stallion, boar, ram) used for obtaining offspring. Artificial insemination enables a single valuable sire to produce hundreds or thousands of offspring a year. For pedigree use, sires are selected from highly productive fertile parents and are evaluated on the basis of their ancestors; they must have a proper conformation, good health, and resistance to disease. In the process of pedigree use they are evaluated on the basis of their progeny. A sire whose offspring excels its parents in productivity and pedigree qualities is considered an improver. Especially valuable are sires that consistently transmit valuable properties to their offspring. In the USSR the best sires are kept at centers where pedigree work is conducted and artificial insemination is performed. The semen of sires is exchanged between countries.

References in periodicals archive ?
Giant's Causeway's brother, the Group 2-placed Freud (98, Storm Cat), is not in that league but has sired two Grade 1 winners from relatively limited opportunities and features regularly among the leading New York sires.
As his race record and pedigree suggested, Green Desert developed primarily into a speed influence; in addition to Sheikh Albadou he sired two winners of the July Cup (Owington and Oasis Dream), four other winners of the Haydock Sprint Cup (Invincible Spirit, Oasis Dream, Tamarisk and Markab) and one winner of the Prix de l'Abbaye (Desert Lord).
Mtoto sired 329 winners on the Flat from 645 foals of racing age, including 27 black-type winners.
Barefoot Lady Footstepsinthesand (sire) - Lady Angharad (Tenby) Breeder: Arbawny Ventures 2000 Sales history: not sold for 9,500gns at Tattersalls October Book 2, bought by Gill Richardson for EUR30,000 at the Goresbridge breeze-up Sire won the 2,000 Guineas and sired last year's close 1,000 Guineas fourth Sent From Heaven and French 2,000 Guineas third Shamalgan from his first crop; dam precocious (won the Woodcote Stakes at two), but progressed into a useful 1m2f performer at three to four.
A notable if not oustanding racehorse in Europe, El Prado has sired some high-class racehorses such as Medaglia D'Oro, himself the sire of great filly Rachel Alexandra, globetrotter Spanish Moon and Breeders' Cup Mile winner Artie Schiller.
Alflora sired the most winners of the British-based stallions with 38, followed by Kayf Tara's 36, Overbury on 29, Dr Massini's 28 and Midnight Legend in fifth with 27.
His sire Midnight Legend had five runners in the race and also sired the runner-up Aimigayle and fifth home Call Me A Legend.
Sakhee's sire Bahri, the winner of the 1995 Queen Elizabeth II Stakes, is a new recruit to the British dual-purpose ranks, as is multiple Group 1 winner Sulamani, who sired St Leger winner Mastery in his first crop.
In going two better than a year ago in the Christmas Hurdle, Binocular led home a one-two of sorts for Breeders' Cup Mile winner Barathea, who sired Binocular's sire, 2,000 Guineas runner-up Enrique, and the runner-up Overturn.