Protococcusn.

Brit.

/ˌprəʊtə(ʊ)ˈkɒkəs/, U.S.

/ˌproʊdoʊˈkɑkəs/

Inflections: Plural Protococci Brit.

/ˌprəʊtə(ʊ)ˈkɒk(s)ʌɪ/, U.S.

/ˌproʊdoʊˈkɑˌkaɪ/.

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

Etymology: < scientific Latin Protococcus ( C. A. Agardh Systema Algarum (1824) p. xvii) < ancient Greek πρωτο- proto- comb. form + κόκκος grain, seed (see coccus n.). Compare French protococcus (1828).

Botany.

A genus of the family Ctenocladaceae (formerly Protococcaceae) of unicellular freshwater green algae, chiefly of spherical shape; (also protococcus) an alga of this genus.Originally applied to Protococcus viridus (also called Pleurococcus viridus), the common green alga which forms patches on tree trunks, walls, etc. The genus has since often been extended to include unicellular algae of many other genera; hence the name is often avoided on account of its perceived ambiguity.

ΘΚΠ

the world > plants > particular plants > algae > [noun] > other algae

slake?a1505

laver1611

sea purse1769

water-net1821

red snow1825

red snow plant1836

hydrodictyon1841

Protococcus1842

snow plant1846

purple laver1847

red snow alga1848

gory dew1861

yellow cell1861

spirogyra1875

blanket-weed1879

phycochrome1881

zoochlorella1882

chlamydomonas1884

zygnemid1887

gonyaulax1902

chlorella1904

chlorophyte1937

1842 Penny Cycl. XXII. 168/1 A field of green snow..accompanied..with the Protococcus, giving a red colour.

1860 Westm. Rev. Jan. 97 It is thus with some of the Protococci, and with the Nostoceae, which exist as cells, imbedded in a viscid matter.

1891 Times 22 Aug. 10/3 Dr. Hickson..referred..to the position of protococcus and volvox, maintaining that both these forms were animal.

1927 F. E. Fritsch West's Brit. Freshwater Algae (rev. ed.) 211 The name Pleurococcus..is quite definitely associated in the minds of all botanists with the green powder-like growth covering tree-trunks and the like, whereas Protococcus is a synonym for the most diverse genera of green Algae.

1961 Wisconsin Rapids Daily Tribune 14 Aug. 12/4 Protococcus is the little alga that turns tree bark green after rains.

1968 Biogr. Mem. Fellows Royal Soc. 14 253 Darkening by soot or by a covering of Protococci and lichens.

1995 Proc. Royal Soc. 253 158/1 Obligately asexual species of green algae (Chlorophyceae) such as Protococcus.

Derivatives

ˌprotoˈcoccal adj. of or relating to the genus Protococcus.

ΘΚΠ

the world > plants > particular plants > algae > [adjective] > of types of algae

confervoid1830

confervaceous1853

glœocapsoid1857

nostochine1857

characeous1866

palmelloid1869

nostocaceous1872

phycochromaceous1873

volvocinaceous1874

rhodophycean1876

protococcal1879

oscillatoriaceous1881

protococcoid1882

volvocinean1885

naviculoid1894

charophytic1920

myxophycean1928

floridean1935

protococcoidal1965

1879 Jrnl. Quekett Microsc. Club 46 My impression,..from an examination of many Amœbæ, is that they are the results of changes from the Protococcal state.

1967 Ecology 48 124/2 20 different strains of protococcal algae.

1994 Environmental Technol. 15 195 The flocculants affected all water ecosystem components and, especially, protococcal algae, invertebrates and adult fish.

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

单词	protococcus
释义	Protococcusn. Brit. /ˌprəʊtə(ʊ)ˈkɒkəs/, U.S. /ˌproʊdoʊˈkɑkəs/ Inflections: Plural Protococci Brit. /ˌprəʊtə(ʊ)ˈkɒk(s)ʌɪ/, U.S. /ˌproʊdoʊˈkɑˌkaɪ/. Origin: A borrowing from Latin. Etymon: Latin Protococcus. Etymology: < scientific Latin Protococcus ( C. A. Agardh Systema Algarum (1824) p. xvii) < ancient Greek πρωτο- proto- comb. form + κόκκος grain, seed (see coccus n.). Compare French protococcus (1828). Botany. A genus of the family Ctenocladaceae (formerly Protococcaceae) of unicellular freshwater green algae, chiefly of spherical shape; (also protococcus) an alga of this genus.Originally applied to Protococcus viridus (also called Pleurococcus viridus), the common green alga which forms patches on tree trunks, walls, etc. The genus has since often been extended to include unicellular algae of many other genera; hence the name is often avoided on account of its perceived ambiguity. ΘΚΠ the world > plants > particular plants > algae > [noun] > other algae slake?a1505 laver1611 sea purse1769 water-net1821 red snow1825 red snow plant1836 hydrodictyon1841 Protococcus1842 snow plant1846 purple laver1847 red snow alga1848 gory dew1861 yellow cell1861 spirogyra1875 blanket-weed1879 phycochrome1881 zoochlorella1882 chlamydomonas1884 zygnemid1887 gonyaulax1902 chlorella1904 chlorophyte1937 1842 Penny Cycl. XXII. 168/1 A field of green snow..accompanied..with the Protococcus, giving a red colour. 1860 Westm. Rev. Jan. 97 It is thus with some of the Protococci, and with the Nostoceae, which exist as cells, imbedded in a viscid matter. 1891 Times 22 Aug. 10/3 Dr. Hickson..referred..to the position of protococcus and volvox, maintaining that both these forms were animal. 1927 F. E. Fritsch West's Brit. Freshwater Algae (rev. ed.) 211 The name Pleurococcus..is quite definitely associated in the minds of all botanists with the green powder-like growth covering tree-trunks and the like, whereas Protococcus is a synonym for the most diverse genera of green Algae. 1961 Wisconsin Rapids Daily Tribune 14 Aug. 12/4 Protococcus is the little alga that turns tree bark green after rains. 1968 Biogr. Mem. Fellows Royal Soc. 14 253 Darkening by soot or by a covering of Protococci and lichens. 1995 Proc. Royal Soc. 253 158/1 Obligately asexual species of green algae (Chlorophyceae) such as Protococcus. Derivatives ˌprotoˈcoccal adj. of or relating to the genus Protococcus. ΘΚΠ the world > plants > particular plants > algae > [adjective] > of types of algae confervoid1830 confervaceous1853 glœocapsoid1857 nostochine1857 characeous1866 palmelloid1869 nostocaceous1872 phycochromaceous1873 volvocinaceous1874 rhodophycean1876 protococcal1879 oscillatoriaceous1881 protococcoid1882 volvocinean1885 naviculoid1894 charophytic1920 myxophycean1928 floridean1935 protococcoidal1965 1879 Jrnl. Quekett Microsc. Club 46 My impression,..from an examination of many Amœbæ, is that they are the results of changes from the Protococcal state. 1967 Ecology 48 124/2 20 different strains of protococcal algae. 1994 Environmental Technol. 15 195 The flocculants affected all water ecosystem components and, especially, protococcal algae, invertebrates and adult fish. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < n.1842
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