meristodermn.

Brit.

/məˈrɪstə(ʊ)dəːm/, U.S.

/məˈrɪstəˌdərm/

Origin: A borrowing from French. Etymon: French méristoderme.

Etymology: < French méristoderme (C. Sauvageau 1918, in Mém. de l'Acad. des Sci. 56 99) < ancient Greek μεριστός divided, divisible (see meristic adj.) + -o- connective + French -derme -derm comb. form.

Botany.

A superficial layer of meristematic cells found in some brown algae, which remains active in the adult sporophyte and contributes to intercalary growth.

ΘΚΠ

the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > embryo parts > [noun] > membrane and layers of cells

germinal layer1836

cell layer1843

mucous layer1846

germ layer1855

mesoblast1857

blastoderm1859

head fold1873

mesoderm1873

epiblast1875

hypoblast1875

splanchnopleure1875

mesenchyme1881

acroblast1884

mesothelium1886

epimere1890

mesectoderm1894

mesendoderm1894

cœloblast1895

placode1907

shield1913

mesentoderm1921

meristoderm1945

bilayer1962

1945 F. E. Fritsch Struct. & Reprod. Algae II. 185 This layer resembles the meristoderm of Laminariales... It is not clear how long the meristoderm remains active.

1969 F. E. Round Introd. Lower Plants iii. 49 Although not as complex as in Laminaria the thallus [of Fucus] is composed of meristoderm, cortex and medulla showing hyphal extension of the cells.

1987 R. L. Fletcher Seaweeds Brit. Isles III. i. 22 In many of the kelps, distinction is made between primary meristoderm, which is located at the junction of frond and stipe and which is responsible for frond growth and stipe elongation, and secondary meristoderm on the stipe which is responsible for increase in stipe growth and haptera formation.

1995 C. van den Hoek et al. Algae xii. 199/1 It seems likely..that the ancestors of the Laminariales had trichothallic meristems and that these were lost during evolution, being replaced by the meristoderm.

This is a new entry (OED Third Edition, September 2001; most recently modified version published online March 2022).

单词	meristoderm
释义	meristodermn. Brit. /məˈrɪstə(ʊ)dəːm/, U.S. /məˈrɪstəˌdərm/ Origin: A borrowing from French. Etymon: French méristoderme. Etymology: < French méristoderme (C. Sauvageau 1918, in Mém. de l'Acad. des Sci. 56 99) < ancient Greek μεριστός divided, divisible (see meristic adj.) + -o- connective + French -derme -derm comb. form. Botany. A superficial layer of meristematic cells found in some brown algae, which remains active in the adult sporophyte and contributes to intercalary growth. ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > embryo parts > [noun] > membrane and layers of cells germinal layer1836 cell layer1843 mucous layer1846 germ layer1855 mesoblast1857 blastoderm1859 head fold1873 mesoderm1873 epiblast1875 hypoblast1875 splanchnopleure1875 mesenchyme1881 acroblast1884 mesothelium1886 epimere1890 mesectoderm1894 mesendoderm1894 cœloblast1895 placode1907 shield1913 mesentoderm1921 meristoderm1945 bilayer1962 1945 F. E. Fritsch Struct. & Reprod. Algae II. 185 This layer resembles the meristoderm of Laminariales... It is not clear how long the meristoderm remains active. 1969 F. E. Round Introd. Lower Plants iii. 49 Although not as complex as in Laminaria the thallus [of Fucus] is composed of meristoderm, cortex and medulla showing hyphal extension of the cells. 1987 R. L. Fletcher Seaweeds Brit. Isles III. i. 22 In many of the kelps, distinction is made between primary meristoderm, which is located at the junction of frond and stipe and which is responsible for frond growth and stipe elongation, and secondary meristoderm on the stipe which is responsible for increase in stipe growth and haptera formation. 1995 C. van den Hoek et al. Algae xii. 199/1 It seems likely..that the ancestors of the Laminariales had trichothallic meristems and that these were lost during evolution, being replaced by the meristoderm. This is a new entry (OED Third Edition, September 2001; most recently modified version published online March 2022). < n.1945
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