dicotyledonn.

/ˌdʌɪkɒtɪˈliːdən/

Etymology: < modern Botanical Latin dīcotylēdones (plural), < Greek δι- twice + κοτυληδών cup-shaped hollow or cavity: see cotyledon n.(The term Dicotyledones was employed by Ray, but its practical introduction into botanical classification dates from Jussieu 1779.)

Botany.

A flowering plant having two cotyledons or seed-lobes: the Dicotyledons (in Botanical Latin Dicotyledones) constitute one of the great classes of flowering plants, characterized by an exogenous mode of growth (hence also called exogens, see exogen n.), and usually by having the parts of the flower in fives or fours, and the veins of the leaves reticulated.

ΘΚΠ

the world > plants > part of plant > reproductive part(s) > seed > plant having seed > [noun] > monocot, dicot, or polycotyleden

dicotyledon1727

monocotyledon1727

polycotyledon1828

dictyogen1841

monocot1854

homogen1866

dicot1877

monocotyl1877

1703 J. Ray Methodus Plantarum (ed. 2) 1 Floriferas dividemus in Dicotyledones, quarum semina sata binis foliis anomalis, Seminalibus dictis, quæ Cotyledonum usum præstant, è terra exeunt.]

1727 N. Bailey Universal Etymol. Eng. Dict. II Dicotyledon (with Botantists), a Term used of Plants, which spring with two Seed Leaves opposite to each other, as the generality of Plants have.

1830 J. Lindley Introd. Nat. Syst. Bot. Introd. 15 Two great divisions..Monocotyledons and Dicotyledons.

1839 Penny Cycl. XIII. 157 In his ‘Genera Plantarum’ Jussieu divided the vegetable kingdom into classes, subclasses, orders, and genera..hence his classes Acotyledons, Monocotyledons, and Dicotyledons.

1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. ii. v. 564 In the great majority of Dicotyledons the parts of the flower are arranged in whorls..the whorls are usually pentamerous, less often tetramerous.

This entry has not yet been fully updated (first published 1895; most recently modified version published online March 2021).

单词	dicotyledon
释义	dicotyledonn. /ˌdʌɪkɒtɪˈliːdən/ Etymology: < modern Botanical Latin dīcotylēdones (plural), < Greek δι- twice + κοτυληδών cup-shaped hollow or cavity: see cotyledon n.(The term Dicotyledones was employed by Ray, but its practical introduction into botanical classification dates from Jussieu 1779.) Botany. A flowering plant having two cotyledons or seed-lobes: the Dicotyledons (in Botanical Latin Dicotyledones) constitute one of the great classes of flowering plants, characterized by an exogenous mode of growth (hence also called exogens, see exogen n.), and usually by having the parts of the flower in fives or fours, and the veins of the leaves reticulated. ΘΚΠ the world > plants > part of plant > reproductive part(s) > seed > plant having seed > [noun] > monocot, dicot, or polycotyleden dicotyledon1727 monocotyledon1727 polycotyledon1828 dictyogen1841 monocot1854 homogen1866 dicot1877 monocotyl1877 1703 J. Ray Methodus Plantarum (ed. 2) 1 Floriferas dividemus in Dicotyledones, quarum semina sata binis foliis anomalis, Seminalibus dictis, quæ Cotyledonum usum præstant, è terra exeunt.] 1727 N. Bailey Universal Etymol. Eng. Dict. II Dicotyledon (with Botantists), a Term used of Plants, which spring with two Seed Leaves opposite to each other, as the generality of Plants have. 1830 J. Lindley Introd. Nat. Syst. Bot. Introd. 15 Two great divisions..Monocotyledons and Dicotyledons. 1839 Penny Cycl. XIII. 157 In his ‘Genera Plantarum’ Jussieu divided the vegetable kingdom into classes, subclasses, orders, and genera..hence his classes Acotyledons, Monocotyledons, and Dicotyledons. 1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. ii. v. 564 In the great majority of Dicotyledons the parts of the flower are arranged in whorls..the whorls are usually pentamerous, less often tetramerous. This entry has not yet been fully updated (first published 1895; most recently modified version published online March 2021). < n.1727
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