protoctistanadj.n.

Brit.

/ˌprəʊtɒkˈtɪst(ə)n/, U.S.

/ˌproʊˌtɑkˈtɪst(ə)n/

Origin: Formed within English, by derivation. Etymons: Protoctista n., -an suffix.

Etymology: < Protoctista n. + -an suffix. Compare earlier protoctist adj., protoctist n.

Biology.

A. adj.

= protoctist adj.

ΚΠ

1983 Precambrian Res. 21 256 Environments like that of the Fawn Limestone in the Kheinjua Formation are unlikely places for protoctistan eukaryotes.

1993 L. Margulis et al. Illustr. Gloss. Protoctista p. xvii/1 Beavers and cervids enjoy diets extremely rich in cellulose; who can even predict the protoctistan populations residing in these and so many other animals?

2005 Jrnl. Sea Res. 54 72/1 The microplankton include autotrophic and heterotrophic bacteria, and photosynthetic..eukaryotes at the protoctistan level of organization.

B. n.

= protoctist n.

ΚΠ

1986 Paleobiology 12 242/1 Paleobiologists are familiar with common skeletal materials..but tend to overlook the many other minerals produced by algae, protoctistans, and bacteria.

2000 Limnol. & Oceanogr. 45 1890/1 Foraminifera are a prolific group of protoctistans that secrete shells.

This is a new entry (OED Third Edition, September 2007; most recently modified version published online March 2022).

单词	protoctistan
释义	protoctistanadj.n. Brit. /ˌprəʊtɒkˈtɪst(ə)n/, U.S. /ˌproʊˌtɑkˈtɪst(ə)n/ Origin: Formed within English, by derivation. Etymons: Protoctista n., -an suffix. Etymology: < Protoctista n. + -an suffix. Compare earlier protoctist adj., protoctist n. Biology. A. adj. = protoctist adj. ΚΠ 1983 Precambrian Res. 21 256 Environments like that of the Fawn Limestone in the Kheinjua Formation are unlikely places for protoctistan eukaryotes. 1993 L. Margulis et al. Illustr. Gloss. Protoctista p. xvii/1 Beavers and cervids enjoy diets extremely rich in cellulose; who can even predict the protoctistan populations residing in these and so many other animals? 2005 Jrnl. Sea Res. 54 72/1 The microplankton include autotrophic and heterotrophic bacteria, and photosynthetic..eukaryotes at the protoctistan level of organization. B. n. = protoctist n. ΚΠ 1986 Paleobiology 12 242/1 Paleobiologists are familiar with common skeletal materials..but tend to overlook the many other minerals produced by algae, protoctistans, and bacteria. 2000 Limnol. & Oceanogr. 45 1890/1 Foraminifera are a prolific group of protoctistans that secrete shells. This is a new entry (OED Third Edition, September 2007; most recently modified version published online March 2022). < adj.n.1983
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