单词 | seed leaf |
释义 | seed leafn. 1. A cotyledon, esp. a cotyledon which has become the first leaf or leaves of a seedling.in the seed leaf: still retaining the seed leaves. ΘΚΠ the world > plants > part of plant > reproductive part(s) > seed > [noun] > parts of > cotyledon or seed-leaf seed leafa1682 seedling leaf1699 ear leaf1718 seed lobe1720 deaf-ear1725 cotyledon1776 a1682 Sir T. Browne Certain Misc. Tracts (1683) i. 66 After the first Leaves succeeding to the Seed Leaves, they send forth a Stalk. 1693 J. Evelyn tr. J. de La Quintinie Dict. in Compl. Gard'ner sig. Bi Seed Leaves, are the first Leaves that Spring up like ears on each side, at the first cleaving or sprouting of any Seed. 1718 R. Bradley New Improvem. Planting & Gardening: Pt. 3 160 Small Herbs in Sallets, are such as should be always cut while they are in the Seed-Leaf; such as Cresses, Mustard, Radish, Turnep, Rape, Spinage and Letuce. 1793 T. Martyn Lang. Bot. sig. E7 In English we commonly call this part the Cotyledon or seed-lobe, when we speak of it as a portion of the seed, in a quiescent state—and the seed-leaf, when the seed is in a growing state. 1822 J. C. Loudon Encycl. Gardening iii. i. 704 He tried dusting the rows, when the plants were in the seed-leaf, with quicklime. 1877 T. H. Huxley & H. N. Martin Course Elem. Biol. (ed. 4) 71 The cotyledons of the contained embryo swell, burst the seed coat, and, becoming green, emerge as the fleshy seed leaves. 1934 Jrnl. Ministry Agric. Dec. 833 The defect..shows itself mainly in the form of a dark, often slightly sunken spot..on the face of each seed-leaf. 1994 Daily Mail (Nexis) 9 Apr. w34 Hold each seedling by a seed leaf and using a dibber or pencil, tease it away from the others. 2011 R. Fortey Survivors vi. 182 The ‘monocots’ have only one seed leaf. 2. Also more fully seed leaf tobacco. Any of several varieties of tobacco, typically grown in the northern United States from imported seed, having broad leaves especially used for cigar wrappers.Frequently with distinguishing word indicating the state where the tobacco is grown. ΘΚΠ the world > physical sensation > use of drugs and poison > tobacco > [noun] > other types of tobacco craccus1617 mavis1641 shoot-tobacco1666 funk1677 black tobacco1698 kite's-foot1788 dark leaf1829 bird's eye1834 bright leaf1834 honeydew tobacco1835 seed leaf1837 long-tails1839 honeydew1843 caporal1850 dogleg tobacco1856 dogleg1863 Boer1881 burley1881 black boy1898 snus1916 1837 Southern Agriculturalist Sept. 494 Seed leaf is considerably grown in Connecticut. 1852 Morning Post 18 June 6/2 By auction 40 bales Havana sold at 271/ 4 to 41 cents. and 37 cases old Pennsylvania seed leaf, 51/ 2 to 131/ 2. 1888 Encycl. Brit. XXIII. 425/2 The ‘seed-leaf’ tobacco of Pennsylvania, Connecticut, and Ohio, grown from Havana seed, is devoted to cigar-making in the United States. 1910 ‘M. Twain’ Speeches 267 I bought what was called a seed-leaf cigar with a Connecticut wrapper. 1925 Times 20 Oct. p. xii/1 Seed leaf is..so called owing to its being raised from Havana seed. 1975 Code of Federal Regulations: 7: Agric. (Office of Federal Register, U.S.) 586/2 The type of cigar-leaf tobacco commonly known as Gebhardt, Ohio Seedleaf, or Ohio Broadleaf. 2002 Philadelphia Inquirer (Nexis) 30 Sept. a1 The state's production of corn, soybeans and seed-leaf tobacco are expected to be below last year's levels. This entry has been updated (OED Third Edition, March 2018; most recently modified version published online June 2022). < |
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