Protophytan.

Brit.

/ˌprəʊtə(ʊ)ˈfʌɪtə/, U.S.

/ˌproʊdoʊˈfaɪdə/

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

Etymology: < scientific Latin protophyta ( E. Fries Systema Mycologicum (1821) I. p. xx), plural of protophytum < proto- proto- comb. form + ancient Greek ϕυτόν plant (see phyton n.). Compare protophyte n.

Botany. Now chiefly historical.

With singular or plural agreement. A class of primitive plants or plantlike organisms regarded as forming the lowest division of the vegetable kingdom (corresponding to the Protozoa in the animal kingdom), spec. one comprising unicellular and other simple green algae. Also, with plural agreement (also protophyta): such plants and organisms collectively.In various early classifications the term also included multicellular algae, fungi, and lichens; in some more recent ones, it included slime moulds, blue-green algae, yeasts, bacteria, etc.Now little used as a formal taxonomic name.

ΘΚΠ

the world > plants > part of plant > cell or aggregate tissue > plant characterized by cells > [noun] > plants characterized by cellular structure > Protophyta single-celled plants

Protophyta1835

1835 W. Kirby On Power of God in Creation of Animals I. iv. 145 Amongst what have been denominated first-plants..Protophyta.

1852 H. Spencer in Westm. Rev. Apr. 477 Though not so great as the fertility of the Protophyta,..the fertility of the Protozoa is yet almost beyond belief.

1858 R. G. Mayne Expos. Lexicon Med. Sci. (1860) 1027/1 Protophytum, applied (Protophyta, nom. pl. n.) by Fries to the Algæ, which he regarded as the first productions of the vegetable kingdom... Mackay established under this name a division containing the Mucores and Lichenes: a protophyte.

1895 Westm. Gaz. 14 Sept. 8/2 The oysters thrive best upon the living protophyta and protozoa.

1927 F. E. Fritsch West's Brit. Freshwater Algae (rev. ed.) Introd. 3 It is evident that there are a large number of phyla of pigmented Protophyta that, commencing with simple flagellate forms, have advanced to a more or less high state of algal organisation.

1965 P. Bell & D. Coombe tr. Strasburger's Textbk. Bot. (new ed.) 56 The Protophyta include all unicellular plants, and also all those plants which consist of loose aggregations of cells showing little or no functional differentiation and which can therefore easily break up at any time to give rise again to a unicellular condition.

1983 S. Holmes Outl. Plant Classif. ii. 8 The Thallophyta is subdivided into the Protophyta, comprising all unicellular and loosely colonial plants, and the Thallophyta proper.

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

单词	protophyta
释义	Protophytan. Brit. /ˌprəʊtə(ʊ)ˈfʌɪtə/, U.S. /ˌproʊdoʊˈfaɪdə/ Origin: A borrowing from Latin. Etymon: Latin protophyta. Etymology: < scientific Latin protophyta ( E. Fries Systema Mycologicum (1821) I. p. xx), plural of protophytum < proto- proto- comb. form + ancient Greek ϕυτόν plant (see phyton n.). Compare protophyte n. Botany. Now chiefly historical. With singular or plural agreement. A class of primitive plants or plantlike organisms regarded as forming the lowest division of the vegetable kingdom (corresponding to the Protozoa in the animal kingdom), spec. one comprising unicellular and other simple green algae. Also, with plural agreement (also protophyta): such plants and organisms collectively.In various early classifications the term also included multicellular algae, fungi, and lichens; in some more recent ones, it included slime moulds, blue-green algae, yeasts, bacteria, etc.Now little used as a formal taxonomic name. ΘΚΠ the world > plants > part of plant > cell or aggregate tissue > plant characterized by cells > [noun] > plants characterized by cellular structure > Protophyta single-celled plants Protophyta1835 1835 W. Kirby On Power of God in Creation of Animals I. iv. 145 Amongst what have been denominated first-plants..Protophyta. 1852 H. Spencer in Westm. Rev. Apr. 477 Though not so great as the fertility of the Protophyta,..the fertility of the Protozoa is yet almost beyond belief. 1858 R. G. Mayne Expos. Lexicon Med. Sci. (1860) 1027/1 Protophytum, applied (Protophyta, nom. pl. n.) by Fries to the Algæ, which he regarded as the first productions of the vegetable kingdom... Mackay established under this name a division containing the Mucores and Lichenes: a protophyte. 1895 Westm. Gaz. 14 Sept. 8/2 The oysters thrive best upon the living protophyta and protozoa. 1927 F. E. Fritsch West's Brit. Freshwater Algae (rev. ed.) Introd. 3 It is evident that there are a large number of phyla of pigmented Protophyta that, commencing with simple flagellate forms, have advanced to a more or less high state of algal organisation. 1965 P. Bell & D. Coombe tr. Strasburger's Textbk. Bot. (new ed.) 56 The Protophyta include all unicellular plants, and also all those plants which consist of loose aggregations of cells showing little or no functional differentiation and which can therefore easily break up at any time to give rise again to a unicellular condition. 1983 S. Holmes Outl. Plant Classif. ii. 8 The Thallophyta is subdivided into the Protophyta, comprising all unicellular and loosely colonial plants, and the Thallophyta proper. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < n.1835
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