nematheciumn.

Brit.

/ˌnɛməˈθiːsɪəm/,

/ˌnɛməˈθiːʃəm/, U.S.

/ˌnɛməˈθiʃ(ə)m/,

/ˌnɛməˈθisiəm/

Inflections: Plural nemathecia.

Origin: A borrowing from Latin. Etymon: Latin nemathecium.

Etymology: < post-classical Latin nemathecium (C. A. Agardh Species Algarum (1823) I. 228) < ancient Greek νῆμα thread (see nemato- comb. form) + post-classical Latin -thecium -thecium comb. form.

Botany.

In many red algae: a fructification, often protuberant and wart-like, containing tetraspore-producing filaments.

ΘΚΠ

the world > plants > particular plants > algae > [noun] > red algae > part or cell of

nemathecium1830

ceramidium1849

tetraspore1857

trichophore1860

phycoerythrin1866

coccidium1867

kalidium1872

cystocarp1875

palmelline1879

tetragonidium1882

rhodoplast1886

nemathece1889

siphon1889

tetrasporangium1890

1830 R. Greville Algæ Brit. 131 Dark red masses..composed entirely of vertical moniliform filaments (nemathecia of Agardh).

1830 R. Greville Algæ Brit. 136 The nemathecia are very beautiful under the microscope.

1841 W. H. Harvey Man. Brit. Algæ 78 Nemathecia also frequently occur on the frondlets.

1899 Ann. Bot. 13 262 The extramatrical filaments gradually form the nemathecium of the parasite.

1925 New Phytologist 24 244 When the threads lie loosely curved in the interior of the thallus as in Chondrus crispus..we may speak of a ‘medullary nemathecium’.

1943 Amer. Jrnl. Bot. 30 574 (caption) Fruiting filaments of tetrasporangial nemathecium of Petrocelix haematis sp. nov.

1997 Phycol. Res. 45 197 Intercalary, cruciately or decussately divided tetrasporangia were formed in 4–6..successive cells of a single filament of the nemathecia.

This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022).

单词	nemathecium
释义	nematheciumn. Brit. /ˌnɛməˈθiːsɪəm/, /ˌnɛməˈθiːʃəm/, U.S. /ˌnɛməˈθiʃ(ə)m/, /ˌnɛməˈθisiəm/ Inflections: Plural nemathecia. Origin: A borrowing from Latin. Etymon: Latin nemathecium. Etymology: < post-classical Latin nemathecium (C. A. Agardh Species Algarum (1823) I. 228) < ancient Greek νῆμα thread (see nemato- comb. form) + post-classical Latin -thecium -thecium comb. form. Botany. In many red algae: a fructification, often protuberant and wart-like, containing tetraspore-producing filaments. ΘΚΠ the world > plants > particular plants > algae > [noun] > red algae > part or cell of nemathecium1830 ceramidium1849 tetraspore1857 trichophore1860 phycoerythrin1866 coccidium1867 kalidium1872 cystocarp1875 palmelline1879 tetragonidium1882 rhodoplast1886 nemathece1889 siphon1889 tetrasporangium1890 1830 R. Greville Algæ Brit. 131 Dark red masses..composed entirely of vertical moniliform filaments (nemathecia of Agardh). 1830 R. Greville Algæ Brit. 136 The nemathecia are very beautiful under the microscope. 1841 W. H. Harvey Man. Brit. Algæ 78 Nemathecia also frequently occur on the frondlets. 1899 Ann. Bot. 13 262 The extramatrical filaments gradually form the nemathecium of the parasite. 1925 New Phytologist 24 244 When the threads lie loosely curved in the interior of the thallus as in Chondrus crispus..we may speak of a ‘medullary nemathecium’. 1943 Amer. Jrnl. Bot. 30 574 (caption) Fruiting filaments of tetrasporangial nemathecium of Petrocelix haematis sp. nov. 1997 Phycol. Res. 45 197 Intercalary, cruciately or decussately divided tetrasporangia were formed in 4–6..successive cells of a single filament of the nemathecia. This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022). < n.1830
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