1601 P. Holland tr. Pliny Hist. World II. 430 Two drams..is thought to be a sufficient dose of Castor.

1646 Sir T. Browne Pseudodoxia Epidemica 150.

1693 Philos. Trans. (Royal Soc.) 17 935 Castor he proves to be the Scent-bags adjoyning to the Intestinum Rectum, and not the Testicles of the Beaver, as some assert.

1750 M. Delany Autobiogr. & Corr. (1861) II. 550 Your letters..have been my castor, pearl cordial, and sal volatile.

a1774 A. Tucker Light of Nature Pursued (1777) III. i. 239 Bezoar, civet, and castor, are the diseases of animals.

1834 J. Forbes tr. R. T. H. Laennec Treat. Dis. Chest (ed. 4) 385 Musk and castor..give more speedy relief.

1839 A. Ure Dict. Arts 271 Chemists..have examined castor; and found it to be composed of a resin, a fatty substance, a volatile oil, an extractive matter, benzoic acid, and some salts.

1640 in J. Entick Hist. London (1767) II. 175 Bever hats, Demi-casters.

1656 T. Blount Glossographia To Rdr. sig. A iij a In London many of the Tradesmen have new Dialects..The Haberdasher is ready to furnish you with a Vigone, Codevec, or Castor.

1675 London Gaz. No. 1031/4 A parcel of Hats, being Mens, Womens, and Boyes, Castors.

1680 London Gaz. No. 1513/4 A thick short boy..with a..gray caster hat.

1688 London Gaz. No. 2363/4 2 black Hats, one a Beaver, the other a new Caster.

1688 R. Holme Acad. Armory iii. 129/1 Of Hats..the Caster..is made of Coney Wooll mixt with Polony Wooll.

1709 R. Steele Tatler No. 46. ⁋1 His Imperial Castor, which he always wears cock'd in Front.

1750 W. Beawes Lex Mercatoria (1752) 578 The Manufactures of this Shire [Derby] are..some Felt, Castor, and Beaver Hats.

1768 L. Sterne Sentimental Journey I. 138 Driven out of my house by domestic winds, and despoil'd of my castor by pontific ones.

1827 W. Scott Chron. Canongate Ser. 1. Introd. iii A white castor on my head.

1838 C. Dickens Oliver Twist xxv.

1849 C. Brontë Shirley II. ii. 44 His coat and castor having been detained at the public-house in pledge.

1728 E. Chambers Cycl. at Castoreum They draw an Oil from it call'd Oil of Castor.

1897 C. T. Davis Manuf. Leather (ed. 2) xxxviii. 519 When finished, [they] bear a close resemblance in texture and quality, to deer-skin or castor.

1910 L. A. Flemming Pract. Tanning (ed. 2) 292 The tanner who wants to make mocha castor glove leather from kid and goat skins.

1923 Daily Mail 14 Feb. 11 Ladies' good quality Washable Castor Gloves.

1904 Daily Chron. 24 Oct. 8/4 Castor-coloured cloth (a soft beaver shade).

1923 Daily Mail 5 June 1 Colours: Nude, Fawn,..Mouse, Castor, Dark Tan.

1676 London Gaz. No. 1079/4 Stole..Six Salts. A Sugar Castar. A Pepper Caster. A Mustard Pot.

1681 London Gaz. No. 1591/4 One Sett of Casters.

1801 Jekyll Tears of Cruets The Sugar Castor Wilberforce supplied.

1809 R. Langford Introd. Trade 84 A Silver Set of Castors.

1836 F. Marryat Mr. Midshipman Easy I. ix. 131 Put before our hero a tin bread-basket..and the pepper-castor.

1861 All Year Round IV. 461 The table-cloth and spoons and castors.

a1800 E. Montagu in J. Doran Lady of Last Century (1873) 52 Like a state-bed running upon castors.

1800 Sir W. Herschel in Philos. Trans. (Royal Soc.) 90 491 An arrangement of twelve bricks, placed on a stand, with casters.

1832 D. Brewster Lett. Nat. Magic xi. 269 The machine runs on casters.

1872 W. Black Strange Adventures Phaeton xxv. 345 You can't have castors on old oak chairs.

1873 J. Richards On Arrangem. Wood-working Factories 42 Trucks with casters.

1690 London Gaz. No. 2539/4 Charles Mansell, a Caster-maker.

1867 F. S. Cozzens Sayings iii. 13 The reflected sunshine from those cut bottles in the castor-stand.

1926 Motor Man. (ed. 26) xix. 193 Caster action, an action tending to maintain the front wheels in the course they are following, obtained by tilting the steering pivots as viewed from the side.

1936 Motor Man. (ed. 29) vii. 121 How a steering head is set to give castor action and camber.

1940 Chambers's Techn. Dict. 141/1 Caster action, the use of inclined king-pins by which the steerable front wheels of a motor vehicle are given fore-and-aft stability..on the principle of the domestic caster.

1936 Motor Man. (ed. 29) vii. 121 The point..is thrust forward by the slope or castor angle of the king pin and slightly to one side according to the camber chosen for the wheel and pin.

1959 Motor 2 Sept. 92/1 Caster angle (the fore-and-aft inclination of the swivel axis).

1963 A. Bird & F. Hutton-Stott Veteran Motor Car Pocketbk. 151 There was no rake or castor-angle to the steering-heads.

1855 E. Acton Mod. Cookery (rev. ed.) xx. 405 Morella cherries..simmered..with three quarters of a pound of castor-sugar.

1885 Catal. Cookery & Food Exhib. 32 Castor Sugar, specially prepared for the London trade.

1894 T. F. Garrett & W. A. Rawson Encycl. Pract. Cookery II. 533/1 White [sugar]..being sometimes sold in the form of a powder as ‘caster Sugar’.

1899 E. E. Mann Liverpool School of Cookery Recipe Bk. (1911) 87 Sift over with castor sugar to dry the surface.

1901 Daily Chron. 30 Nov. 8/4 1½ oz. of castor sugar.

1951 Mrs. Beeton's Bk. Househ. Managem. (rev. ed.) xxxiv. 870 Sago snow..2 ozs. of sago, 2 pints of milk, 2 ozs. of castor sugar, 2 or 3 eggs, vanilla.

1805 R. W. Dickson Pract. Agric. I. Pl. ix. to face p. 40 The profile of a six-shared horse-hoe on the principle of the pentagraph, improved by Mr. Amos by the addition of two castor-wheels to regulate depth.

a1877 E. H. Knight Pract. Dict. Mech. I. 498/2 The caster-wheel is used as a support to the front parts of machines, such as harvesters..and plowing machines, to enable them to be steered or to turn short around at the end of the row.

1883 J. Payn Thicker than Water II. xx. 29 Chairs rickety and castorless.

1891 M. M. Dowie Girl in Karpathians 143 A castorless arm-chair.

1906 Westm. Gaz. 28 July 3/1 In the affectionate embrace of our stuffed arm-chair—how we love its scarred skin, its castorless immobility!

1526 Bible (Tyndale) Acts xxviii. 11 A ship of Alexandry, which had wyntred in the Yle, whose badge was Castor and Pollux.

1647 N. Ward Simple Cobler Aggawam 36 Truth and peace are the Castor and Pollux of the Gospel.

1868 W. Lockyer & J. N. Lockyer tr. A. Guillemin Heavens (ed. 3) 350 (note) Castor is a binary system to which..doubtless belongs a third star, which participates in the proper movement of the two others.

1708 P. A. Motteux Wks. F. Rabelais (1737) v. xviii. 77 He had seen Castor at the Main-yard-arm.

1769 W. Falconer Universal Dict. Marine Transl. French Terms Feu saint Elme, a corposant, sometimes called Castor and Pollux.

1888 Brit. Med. Jrnl. 25 Feb. The singular patch of hard integument known as the castor on the inside of the foreleg of the horse.

1888 Veterinarian May 304 Another organ in process of disappearance is that piece of horn inside the fore~arm, where it is termed the chestnut, and that inside the hock, where it is termed the castor; it corresponds to the finger-nail of the thumb of our hand, and of the foot of the five-toed ancestor of the horse.

1828 E. T. Artis Durobrivae of Antoninus Pl. 48 Fine red Ware in relief, collected in excavating the remains of a Roman Pottery in the parish of Castor.]

1857 C. R. Smith Coll. Antiqua IV. 81 Ancient pottery discovered in this country..a particular kind..belongs to a class..termed Castor or Northamptonshire ware, on account of its having occurred frequently in immediate connection with potters' kilns discovered near Castor, by the late Mr. E. T. Artis.

1868 C. R. Smith Coll. Antiqua VI. 175 ‘Upchurch pottery’ and ‘Castor ware’ are terms..denoting certain classes of fictile vessels made near Upchurch on the Medway, and at or near Castor on the Nen.

1923 R. G. Collingwood Roman Brit. 73 The imported Samian ware..provoked the British manufacturer to..put on the market a style of pottery which resembled it in having ornament in relief and a highly glazed surface. Thus was produced what is known as Castor ware.

1945 S. E. Winbolt Brit. under Romans ix. 123 Somewhat more fragile, but more interesting in their designs, were the slate-coloured vessels of ‘Castor’ ware, decorated in raised creamy slip with hunting-scenes.

1963 Times 12 Mar. 5/2 A Roman beaker of about a.d. 200 decorated with a hound chasing a hare, possibly Castor ware.