megasporophylln.

Brit.

/ˌmɛɡəˈspɒrə(ʊ)fɪl/,

/ˌmɛɡəˈspɔːrəfɪl/, U.S.

/ˌmɛɡəˈspɔrəˌfɪl/

Origin: Formed within English, by compounding. Etymons: mega- comb. form, sporophyll n. at sporo- comb. form

Etymology: < mega- comb. form + sporophyll n. at sporo- comb. form . Compare earlier macrosporophyll n., microsporophyll n.

Botany.

A sporophyll that bears megasporangia (e.g. the carpel of an angiosperm or ovuliferous scale of a gymnosperm).

ΘΚΠ

the world > plants > part of plant > reproductive part(s) > spore or sporule > [noun] > type of > megaspore or megasporange > leaf bearing

macrosporophyll1888

megasporophyll1900

1900 Bot. Gaz. 29 323 It is not at all uncommon, especially in I[soetes] Engelmanni, to find the regular sequence interrupted by the occurrence of several megasporophylls among the microsporophylls.

1902 Encycl. Brit. XXV. 432/2 The microsporophylls (stamens) and the megasporophylls (carpels).

1945 W. O. Howarth & L. G. G. Warne Lowson's Textbk. Bot. (ed. 9) ix. 246 In the Gymnosperms, the ovules are not enclosed in an ovary, but are borne in most cases on the open megasporophylls.

1974 Encycl. Brit. Macropædia XVI. 481/1 In the European pine Pinus sylvestris..the female cones (essentially collections of megasporophylls) begin to develop in winter and are ready to receive pollen from the male cones in spring.

1992 M. Ingrouille Diversity & Evol. Land Plants 112 Another cycad Ceratozamia has just two ovules on each megasporophyll.

This entry has been updated (OED Third Edition, June 2001; most recently modified version published online March 2022).

单词	megasporophyll
释义	megasporophylln. Brit. /ˌmɛɡəˈspɒrə(ʊ)fɪl/, /ˌmɛɡəˈspɔːrəfɪl/, U.S. /ˌmɛɡəˈspɔrəˌfɪl/ Origin: Formed within English, by compounding. Etymons: mega- comb. form, sporophyll n. at sporo- comb. form Etymology: < mega- comb. form + sporophyll n. at sporo- comb. form . Compare earlier macrosporophyll n., microsporophyll n. Botany. A sporophyll that bears megasporangia (e.g. the carpel of an angiosperm or ovuliferous scale of a gymnosperm). ΘΚΠ the world > plants > part of plant > reproductive part(s) > spore or sporule > [noun] > type of > megaspore or megasporange > leaf bearing macrosporophyll1888 megasporophyll1900 1900 Bot. Gaz. 29 323 It is not at all uncommon, especially in I[soetes] Engelmanni, to find the regular sequence interrupted by the occurrence of several megasporophylls among the microsporophylls. 1902 Encycl. Brit. XXV. 432/2 The microsporophylls (stamens) and the megasporophylls (carpels). 1945 W. O. Howarth & L. G. G. Warne Lowson's Textbk. Bot. (ed. 9) ix. 246 In the Gymnosperms, the ovules are not enclosed in an ovary, but are borne in most cases on the open megasporophylls. 1974 Encycl. Brit. Macropædia XVI. 481/1 In the European pine Pinus sylvestris..the female cones (essentially collections of megasporophylls) begin to develop in winter and are ready to receive pollen from the male cones in spring. 1992 M. Ingrouille Diversity & Evol. Land Plants 112 Another cycad Ceratozamia has just two ovules on each megasporophyll. This entry has been updated (OED Third Edition, June 2001; most recently modified version published online March 2022). < n.1900
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