prothalliumn.

Brit.

/prəʊˈθalɪəm/, U.S.

/proʊˈθæliəm/

Inflections: Plural prothallia.

Origin: A borrowing from Latin, combined with an English element. Etymons: prothallus n., Latin -ium.

Etymology: < prothallus n. + scientific Latin -ium (see -y suffix⁴).

Botany.

= prothallus n. 1.

ΘΚΠ

the world > plants > part of plant > reproductive part(s) > spore or sporule > cryptogam or plant having spores > [noun] > parts of > thallus

thallus1829

proembryo1854

prothallus1854

protonema1857

prothallium1858

thallome1875

blastema1880

prothallus1921

1858 E. Lankester & W. B. Carpenter Veg. Physiol. (new ed.) §402 This Marchantia-like expansion has received the name of prothallium, and it is on this little membranous body, that the archegonia and pistillidia make their appearance.

1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 335 In the Ferns and Equisetaceæ the prothallium resembles the thallus of the lowest Hepaticæ.

1935 C. J. Chamberlain Gymnosperms xiii. 309 In some heterosporous pteridophyte ancestor [of the conifers], the prothallium (gametophyte) became included within the spore..and finally disappeared entirely.

2004 Atlanta (Georgia) Jrnl.–Constit. (Nexis) 23 Jan. (Home section) 5 Fern spores are released in fall. They drop onto damp soil and germinate into a..prothallium, that releases separate male and female cells.

This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).

单词	prothallium
释义	prothalliumn. Brit. /prəʊˈθalɪəm/, U.S. /proʊˈθæliəm/ Inflections: Plural prothallia. Origin: A borrowing from Latin, combined with an English element. Etymons: prothallus n., Latin -ium. Etymology: < prothallus n. + scientific Latin -ium (see -y suffix⁴). Botany. = prothallus n. 1. ΘΚΠ the world > plants > part of plant > reproductive part(s) > spore or sporule > cryptogam or plant having spores > [noun] > parts of > thallus thallus1829 proembryo1854 prothallus1854 protonema1857 prothallium1858 thallome1875 blastema1880 prothallus1921 1858 E. Lankester & W. B. Carpenter Veg. Physiol. (new ed.) §402 This Marchantia-like expansion has received the name of prothallium, and it is on this little membranous body, that the archegonia and pistillidia make their appearance. 1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 335 In the Ferns and Equisetaceæ the prothallium resembles the thallus of the lowest Hepaticæ. 1935 C. J. Chamberlain Gymnosperms xiii. 309 In some heterosporous pteridophyte ancestor [of the conifers], the prothallium (gametophyte) became included within the spore..and finally disappeared entirely. 2004 Atlanta (Georgia) Jrnl.–Constit. (Nexis) 23 Jan. (Home section) 5 Fern spores are released in fall. They drop onto damp soil and germinate into a..prothallium, that releases separate male and female cells. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < n.1858
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