heterokontn.adj.

Brit.

/ˈhɛt(ə)rəʊˌkɒnt/, U.S.

/ˈhɛdəroʊˌkɑnt/

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

Etymology: < scientific Latin Heterokontae, class name ( A. Lüther 1899, in Bihang til Kongliga Svenska Vetenskaps-Akademiens Handlingar 24 (No. 13) 19; < post-classical Latin hetero- hetero- comb. form + ancient Greek κοντός pole, with reference to the two types of flagellum); later also in form Heterokonta (1956 or earlier).

Biology.

A. n.

Originally: a member of the class Heterokontae (now usually called Xanthophyceae), containing yellow-green algae whose motile cells or zoospores have two dissimilar flagella (now rare). In later use: a member of the (proposed) phylum Heterokonta, a much broader group of single-celled and multicellular eukaryotes also including brown algae, diatoms, oomycetes, and other algal or fungus-like organisms, whose motile cells or zoospores typically have two dissimilar flagella, one with lateral filaments and the other smooth and shorter (or sometimes absent).

ΚΠ

1915 Jrnl. Royal Microsc. Soc. 282 Other species in the same plant included two Flagellates, one Heterokont, three Protococcaceæ, [etc.].

1977 Q. Rev. Biol. 52 255/1 It is possible that a whiplash flagellum disappeared in a line from heterokonts to bacillariophytes.

1989 Mycologia 81 490/2 Dick..presents a tentative phylogeny and diagram of all heterokonts.

2004 Amer. Jrnl. Bot. 91 1487/1 An analysis of six concatenated genes supports the alveolates and heterokonts strongly.

B. adj.

Of or relating to heterokonts (in either sense). Also: having two dissimilar flagella; (of flagella) dissimilar.

ΚΠ

1923 Bull. Torrey Bot. Club 50 201 The nature of the cilia of the antherozoid suggest a possible heterokont relationship.

1986 S. T. Moss Biol. Marine Fungi xi. 105 A zoosporangium within which are formed many laterally biflagellate, heterokont zoospores.

1995 C. van den Hoek et al. Algae vii. 129/1 Each [spermatozoid] has a pair of heterokont flagella.

2013 P. Bohutskyi & E. Bouwer in J. W. Lee Adv. Biofuels & Bioproducts xxxvi. 881 Several Heterokont algae are used in mariculture.

This is a new entry (OED Third Edition, June 2015; most recently modified version published online March 2022).

单词	heterokont
释义	heterokontn.adj. Brit. /ˈhɛt(ə)rəʊˌkɒnt/, U.S. /ˈhɛdəroʊˌkɑnt/ Origin: A borrowing from Latin. Etymon: Latin Heterokontae. Etymology: < scientific Latin Heterokontae, class name ( A. Lüther 1899, in Bihang til Kongliga Svenska Vetenskaps-Akademiens Handlingar 24 (No. 13) 19; < post-classical Latin hetero- hetero- comb. form + ancient Greek κοντός pole, with reference to the two types of flagellum); later also in form Heterokonta (1956 or earlier). Biology. A. n. Originally: a member of the class Heterokontae (now usually called Xanthophyceae), containing yellow-green algae whose motile cells or zoospores have two dissimilar flagella (now rare). In later use: a member of the (proposed) phylum Heterokonta, a much broader group of single-celled and multicellular eukaryotes also including brown algae, diatoms, oomycetes, and other algal or fungus-like organisms, whose motile cells or zoospores typically have two dissimilar flagella, one with lateral filaments and the other smooth and shorter (or sometimes absent). ΚΠ 1915 Jrnl. Royal Microsc. Soc. 282 Other species in the same plant included two Flagellates, one Heterokont, three Protococcaceæ, [etc.]. 1977 Q. Rev. Biol. 52 255/1 It is possible that a whiplash flagellum disappeared in a line from heterokonts to bacillariophytes. 1989 Mycologia 81 490/2 Dick..presents a tentative phylogeny and diagram of all heterokonts. 2004 Amer. Jrnl. Bot. 91 1487/1 An analysis of six concatenated genes supports the alveolates and heterokonts strongly. B. adj. Of or relating to heterokonts (in either sense). Also: having two dissimilar flagella; (of flagella) dissimilar. ΚΠ 1923 Bull. Torrey Bot. Club 50 201 The nature of the cilia of the antherozoid suggest a possible heterokont relationship. 1986 S. T. Moss Biol. Marine Fungi xi. 105 A zoosporangium within which are formed many laterally biflagellate, heterokont zoospores. 1995 C. van den Hoek et al. Algae vii. 129/1 Each [spermatozoid] has a pair of heterokont flagella. 2013 P. Bohutskyi & E. Bouwer in J. W. Lee Adv. Biofuels & Bioproducts xxxvi. 881 Several Heterokont algae are used in mariculture. This is a new entry (OED Third Edition, June 2015; most recently modified version published online March 2022). < n.adj.1915
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