red algan.

Brit.

/ˌrɛd ˈalɡə/, U.S.

/ˈˌrɛd ˈælɡə/

Inflections: Plural red algae Brit.

/ˌrɛd ˈaldʒiː/,

/ˌrɛd ˈalɡiː/, U.S.

/ˈˌrɛd ˈælˌdʒi/.

Origin: Formed within English, by compounding. Etymons: red adj., alga n.

Etymology: < red adj. + alga n. Compare slightly earlier red snow n. 2 and slightly later red snow alga n. at red snow n. Compounds 2.

Botany.

An alga containing or producing red pigment; (in later use) spec. any alga belonging to the division Rhodophyta, comprising predominantly marine algae in which chlorophyll and blue pigments are masked by the red pigment phycoerythrin.In quot. 1834: = red snow alga n. at red snow n. Compounds 2.

ΘΚΠ

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

red alga1834

rhodosperm1847

dough balls1876

lithothamnion1895

rhodophyte1932

1834 M. Somerville On Connexion Physical Sci. xxvii. 273 The snow itself..produces a red alga, discovered by Saussure in the frozen declivities of the Alps.

1852 W. H. Harvey Nereis Boreali-Americana i. 24 in Smithsonian Contrib. Knowl. 3 Among the red Algae (or Rhodosperms), species with expanded, leaf-like fronds are proportionably less numerous than on the European side.

1852 W. H. Harvey in Smithson. Contrib. Knowl. 5 v. 1 Sub-Class II. Rhodospermeæ or Red Algæ.

1876 G. B. Goode Classif. Coll. Illustr. Animal Resources U.S. 60 On the coast of Maine, the bright-red variety of the Cod..is found only on bottoms covered with Red Algæ.

1910 Encycl. Brit. I. 591/2 Some Red Algae find a home in the gelatinous substance of Flustra, Alcyonidium and other polyzoa.

1937 J. E. Tilden Algae & their Life Relations v. 106 A few red algae actually live in the streams, some at high altitudes.

1991 Toronto Star 12 Oct. e17 A reddish discoloration of sea water caused by large numbers of red algae.

2002 New Scientist 1 June 16/3 Furanones were identified a few years ago as the agents that keep the red alga Delisea pulchra free of bacteria and other marine organisms.

Derivatives

ˌred ˈalgal adj. of or relating to red algae.

ΚΠ

1913 Jrnl. Ecol. 1 138 It is characterised specially by the presence of a number of small floridean (red algal) societies.

1948 Amer. Jrnl. Bot. 35 404 A large percentage of red algal thalli are in fruit each month of the year.

1992 Pract. Fishkeeping Mar. 72/1 The particular spectral value of this lighting is not an encouragement to the red algal growth.

This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022).

单词	red alga
释义	red algan. Brit. /ˌrɛd ˈalɡə/, U.S. /ˈˌrɛd ˈælɡə/ Inflections: Plural red algae Brit. /ˌrɛd ˈaldʒiː/, /ˌrɛd ˈalɡiː/, U.S. /ˈˌrɛd ˈælˌdʒi/. Origin: Formed within English, by compounding. Etymons: red adj., alga n. Etymology: < red adj. + alga n. Compare slightly earlier red snow n. 2 and slightly later red snow alga n. at red snow n. Compounds 2. Botany. An alga containing or producing red pigment; (in later use) spec. any alga belonging to the division Rhodophyta, comprising predominantly marine algae in which chlorophyll and blue pigments are masked by the red pigment phycoerythrin.In quot. 1834: = red snow alga n. at red snow n. Compounds 2. ΘΚΠ the world > plants > particular plants > algae > [noun] > red algae red alga1834 rhodosperm1847 dough balls1876 lithothamnion1895 rhodophyte1932 1834 M. Somerville On Connexion Physical Sci. xxvii. 273 The snow itself..produces a red alga, discovered by Saussure in the frozen declivities of the Alps. 1852 W. H. Harvey Nereis Boreali-Americana i. 24 in Smithsonian Contrib. Knowl. 3 Among the red Algae (or Rhodosperms), species with expanded, leaf-like fronds are proportionably less numerous than on the European side. 1852 W. H. Harvey in Smithson. Contrib. Knowl. 5 v. 1 Sub-Class II. Rhodospermeæ or Red Algæ. 1876 G. B. Goode Classif. Coll. Illustr. Animal Resources U.S. 60 On the coast of Maine, the bright-red variety of the Cod..is found only on bottoms covered with Red Algæ. 1910 Encycl. Brit. I. 591/2 Some Red Algae find a home in the gelatinous substance of Flustra, Alcyonidium and other polyzoa. 1937 J. E. Tilden Algae & their Life Relations v. 106 A few red algae actually live in the streams, some at high altitudes. 1991 Toronto Star 12 Oct. e17 A reddish discoloration of sea water caused by large numbers of red algae. 2002 New Scientist 1 June 16/3 Furanones were identified a few years ago as the agents that keep the red alga Delisea pulchra free of bacteria and other marine organisms. Derivatives ˌred ˈalgal adj. of or relating to red algae. ΚΠ 1913 Jrnl. Ecol. 1 138 It is characterised specially by the presence of a number of small floridean (red algal) societies. 1948 Amer. Jrnl. Bot. 35 404 A large percentage of red algal thalli are in fruit each month of the year. 1992 Pract. Fishkeeping Mar. 72/1 The particular spectral value of this lighting is not an encouragement to the red algal growth. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022). < n.1834
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