1659 T. Fuller Appeal Iniured Innocence i. 65 There were lately false twenty Shilling pieces, (commonly called Morgans) coyned by a cunning and cheating Chymist.

1669 J. Worlidge Systema Agriculturæ 168 Mugwort, Morgan, Wormwood,..or other bitter or noisome Weeds or Herbs.

a1722 E. Lisle Observ. Husbandry (1757) 448 I filled my meads with morgan and other trumpery.

1766 Compl. Farmer (at cited word) Morgan, the same with May-weed.

1847 J. O. Halliwell Dict. Archaic & Provinc. Words II Margan, the stinking camomile.

1856 W. A. Bromfield Flora Vectensis 263 Plant well known to reapers by the name of Morgin, and unanimously accused of blistering the feet, hands and open bosoms of those employed in making up the corn into shocks.

1886 J. Britten & R. Holland Dict. Eng. Plant-names 341 Dutch Morgan, Chrysanthemum Leucanthemum.

1892 Times 15 Feb. 12/1 A large number of ewes are said to have aborted in one farm in Hampshire through being fed on hay containing ‘morgan’ or ‘hay weed’.

1988 J. Lavers Dict. Isle of Wight Dial. 56 Morgan. Also marvins. The stinking chamomile.

1841 Spirit of Times 24 July 246/3 They are known as the ‘Morgan breed’.

1849 New Eng. Farmer 1 314 There has never been a stock of horses in New England which has proved so generally useful as the Morgan stock of the original Morgan horse, raised by Justin Morgan..in 1793.

1869 C. L. Brace New West xiv. 187 Each coach well made and comfortable, with six horses, evidently picked Morgans.

1884 J. Hay Bread-winners v. 77 If you don't want to talk, a train of Morgan horses couldn't make you.

1906 W. Churchill Coniston 22 The tough little Morgans of that time..have all but disappeared.

1934 Dict. Amer. Biogr. XIII. 183/1 Before the middle of the nineteenth century Morgan horses had become a distinct type or breed, famed throughout the country for their attractive appearance and their endurance, docility, and utility as driving, riding, cavalry, stage, and general-purpose horses.

1973 Washington Post 13 Jan. f1/7 (advt.) Must sell this w[ee]kend.—Dark bay Morgan gelding, 15·2 h, good temperament, excel. hunter prospect.

1992 Morgan Horse Nov. 25/1 The one thing the classic good Morgan has got that the classic English horse of today hasn't is that wonderful curvaceous upheaded outline.

1919 J. B. S. Haldane in Jrnl. Genetics 8 305 Let x be the distance between the loci of two factors, y their cross-over value, and let the unit of distance be chosen so that when y is sufficiently small x becomes equal to y... The value of y for a given value of x is the sum of the probabilities of all odd numbers of cross-overs. ∴y =..½ (1 − e^−2x)... It is suggested that the unit of distance in a chromosome as defined above be termed a ‘morgan’, on the analogy of the ohm, volt, etc. Morgan's unit of distance is therefore a centimorgan.

1919 J. B. S. Haldane in Jrnl. Genetics 8 305 The cross-over values ·412 and ·236 correspond, according to curve (c),..to distances of ·549 and ·261 morgans respectively.

1965 J. A. Serra Mod. Genetics I. vii. 260 Map distances between gene loci are the cross-over values expressed as percentages of recombination for small intervals. Thus, 1% of recombination is often called one cross-over unit..or a centimorgan... One morgan is equal to 100 centimorgans. [Note] Some authors call a cross-over unit one morgan.

1971 Nature 24 Dec. 475/1 Pedigree studies by Lawler and her co-workers established a close linkage (0·03 morgans) between Rh, the rhesus set of blood group loci, and one of the loci, El₁, that can lead to elliptocytosis of the red cell.

1993 Theoret. & Appl. Genetics 86 492 The average map distance between the quantitative trait loci..and their nearest marker was 0.15 Morgans.