polycotyledonaryadj.

Brit.

/ˌpɒlɪˌkɒtᵻˈliːdn̩(ə)ri/, U.S.

/ˈˌpɑliˌkɑdəˈlidnˌɛri/

Origin: Formed within English, by compounding. Etymons: poly- comb. form, cotyledonary adj.

Etymology: < poly- comb. form + cotyledonary adj. In sense 2 after polycotyledon n. Compare earlier polycotyledonous adj. and dicotyledonary adj.

1. Zoology. (Of a chorion or placenta) having many cotyledons (tufts of villi); (of an animal) having such a chorion or placenta. Now rare.

ΚΠ

1875 Proc. Royal Soc. 24 154 The non-placental area of the mucosa contained tubular glands, which..were not nearly so numerous as in the gravid mucosa of animals having a diffused or polycotyledonary placenta.

1906 Philos. Trans. (Royal Soc.) B. 198 204 In the sheep [placenta] there are special trophospongial areas which cause the polycotyledonary form.

2004 Placenta 25 705 The gross structure of the placenta was..noticeably different from other ruminants which are polycotyledonary.

2. Botany. Of a plant embryo: = polycotyledonous adj. rare.

ΘΚΠ

the world > plants > part of plant > reproductive part(s) > seed > plant having seed > [adjective] > mono-, di-, or polycotyledonous

monocotyledonous1770

dicotyledonous1785

polycotyledonous1800

monocotyle1828

monocotyledonous1849

dictyogenous1852

dicotyledonary1870

monocotylous1905

monocot1938

polycotyledonary1989

monocotyl1995

1989 Amer. Jrnl. Bot. 76 223 Features include..pollen cone morphology that is markedly different from modern Pinaceae, and polycotyledonary embryos.

1998 Phytomorphology 48 225 Polycotyledonary embryos appeared in larger numbers on the MS basal medium supplemented with ABA than on the medium without growth regulator.

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

单词	polycotyledonary
释义	polycotyledonaryadj. Brit. /ˌpɒlɪˌkɒtᵻˈliːdn̩(ə)ri/, U.S. /ˈˌpɑliˌkɑdəˈlidnˌɛri/ Origin: Formed within English, by compounding. Etymons: poly- comb. form, cotyledonary adj. Etymology: < poly- comb. form + cotyledonary adj. In sense 2 after polycotyledon n. Compare earlier polycotyledonous adj. and dicotyledonary adj. 1. Zoology. (Of a chorion or placenta) having many cotyledons (tufts of villi); (of an animal) having such a chorion or placenta. Now rare. ΚΠ 1875 Proc. Royal Soc. 24 154 The non-placental area of the mucosa contained tubular glands, which..were not nearly so numerous as in the gravid mucosa of animals having a diffused or polycotyledonary placenta. 1906 Philos. Trans. (Royal Soc.) B. 198 204 In the sheep [placenta] there are special trophospongial areas which cause the polycotyledonary form. 2004 Placenta 25 705 The gross structure of the placenta was..noticeably different from other ruminants which are polycotyledonary. 2. Botany. Of a plant embryo: = polycotyledonous adj. rare. ΘΚΠ the world > plants > part of plant > reproductive part(s) > seed > plant having seed > [adjective] > mono-, di-, or polycotyledonous monocotyledonous1770 dicotyledonous1785 polycotyledonous1800 monocotyle1828 monocotyledonous1849 dictyogenous1852 dicotyledonary1870 monocotylous1905 monocot1938 polycotyledonary1989 monocotyl1995 1989 Amer. Jrnl. Bot. 76 223 Features include..pollen cone morphology that is markedly different from modern Pinaceae, and polycotyledonary embryos. 1998 Phytomorphology 48 225 Polycotyledonary embryos appeared in larger numbers on the MS basal medium supplemented with ABA than on the medium without growth regulator. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < adj.1875
随便看	burns away burns down burns off burns out burns up burnsian burnsiana burnside burnsides burnsite burnstick burnt burnt alabaster burnt almond burnt alum burnt away burnt brandy burnt carmine burnt choler burnt colour burnt copper burnt cork burnt cream burnt crimson lake burnt down