polycotyledonn.

Brit.

/ˌpɒlɪˌkɒtᵻˈliːdn/, U.S.

/ˈˌpɑliˌkɑdəˈlid(ə)n/

Origin: Formed within English, by compounding; modelled on a Latin lexical item. Etymons: poly- comb. form, cotyledon n.

Etymology: < poly- comb. form + cotyledon n., after scientific Latin Polycotyledones (1759 or earlier). Compare earlier polycotyledonous adj.Compare the following example of the scientific Latin word in an English context:1760 J. Lee Introd. Bot. iii. xi. 194 Polycotyledones, with many Cotyledons.

Botany. Now rare.

A plant whose embryo has more than two cotyledons, or more than the normal number of cotyledons. Later also: a cotyledon from such an embryo.

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

1828 N. Webster Amer. Dict. Eng. Lang. Polycotyledon, in botany, a plant that has many or more than two cotyledons or lobes to the seed.

1834 J. Lindley Nat. Syst. Bot. (ed. 2) p. xi They [sc. gymnosperms] have in many cases more cotyledons than two, whence they have been called Polycotyledons.

1874 R. Brown Man. Bot. iii. xi. 511 The accuracy of the classification named, founded on the number of cotyledons, has been called in question; and another division, founded on this supposed peculiarity in Coniferæ, has been founded by some systematists, and called polycotyledons, or plants with many cotyledons.

1914 New Phytologist 13 286 Agardh's..Dicotyledons include true Dicotyledons..and Polycotyledons, namely Conifers.

1998 Phytomorphology 48 225 Polycotyledons were formed in two ways: (1) the embryo had initially two unequal cotyledons and [the] larger cotyledon branched.., (2) polycotyledons also developed independently.

This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).

单词	polycotyledon
释义	polycotyledonn. Brit. /ˌpɒlɪˌkɒtᵻˈliːdn/, U.S. /ˈˌpɑliˌkɑdəˈlid(ə)n/ Origin: Formed within English, by compounding; modelled on a Latin lexical item. Etymons: poly- comb. form, cotyledon n. Etymology: < poly- comb. form + cotyledon n., after scientific Latin Polycotyledones (1759 or earlier). Compare earlier polycotyledonous adj.Compare the following example of the scientific Latin word in an English context:1760 J. Lee Introd. Bot. iii. xi. 194 Polycotyledones, with many Cotyledons. Botany. Now rare. A plant whose embryo has more than two cotyledons, or more than the normal number of cotyledons. Later also: a cotyledon from such an embryo. 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 1828 N. Webster Amer. Dict. Eng. Lang. Polycotyledon, in botany, a plant that has many or more than two cotyledons or lobes to the seed. 1834 J. Lindley Nat. Syst. Bot. (ed. 2) p. xi They [sc. gymnosperms] have in many cases more cotyledons than two, whence they have been called Polycotyledons. 1874 R. Brown Man. Bot. iii. xi. 511 The accuracy of the classification named, founded on the number of cotyledons, has been called in question; and another division, founded on this supposed peculiarity in Coniferæ, has been founded by some systematists, and called polycotyledons, or plants with many cotyledons. 1914 New Phytologist 13 286 Agardh's..Dicotyledons include true Dicotyledons..and Polycotyledons, namely Conifers. 1998 Phytomorphology 48 225 Polycotyledons were formed in two ways: (1) the embryo had initially two unequal cotyledons and [the] larger cotyledon branched.., (2) polycotyledons also developed independently. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < n.1828
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