planktonicadj.n.

Brit.

/plaŋ(k)ˈtɒnɪk/, U.S.

/plæŋkˈtɑnɪk/

Forms: see plankton n. and -ic suffix.

Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: plankton n., -ic suffix.

Etymology: < plankton n. + -ic suffix, after German planktonisch (E. Haeckel 1891, in Jenaische Zeitschr. f. Naturwiss. 25 240).

Biology.

A. adj.

Of, relating to, characteristic of, or found in plankton; designating an organism that habitually floats or drifts in water, or a stage in the life cycle of an organism during which it does this.

ΘΚΠ

the world > life > biology > organism > plankton > [adjective]

planktonic1893

zooplanktonic1912

planktic1947

1893 G. W. Field tr. E. Haeckel Planktonic Stud. in Rep. U.S. Comm. Fisheries 1889–91 571 I adopt the term Plankton in place of ‘Auftrieb’, and derive from it the adjective planktonic.

1899 Proc. Zool. Soc. 1029 Most, if not all, Globigerinæ, are essentially planktonic organisms.

1930 Times Educ. Suppl. 22 Mar. (Home & Classroom Suppl.) p. iv/1 Quantities of nektonic and planktonic life are being caught daily.

1963 Times 19 Feb. 10/4 Sediments of past ages..contain a boundary clearly defined by changes in their content of fossilized planktonic remains.

1974 Nature 8 Feb. 393/2 Herbivorous zooplankton can graze on planktonic algae, bacteria and detrital particles.

1992 Nature Canada Spring 33/2 Each year minke, fin, blue, and beluga whales rendezvous in the area to feast on the rich planktonic ‘soup’.

B. n.

(A fossil of) a planktonic organism, esp. a foraminiferan.

ΘΚΠ

the world > animals > invertebrates > protozoa > class Sarcodina > order Rhizopoda > [noun] > suborder Foraminifera > member of > microfossil

planktonic1959

1959 Bull. Amer. Paleontol. 39 84 These assemblages of agglutinated forms..occur several times and are separated by assemblages of calcareous forms, often with abundant planktonics, suggestive of a depositional depth between 200 and 600 metres.

1964 Micropaleontology 10 3/2 The coiling characteristics of planktonics can be most useful in correlating strata from different basins and with entirely different benthic biofacies.

1989 New Scientist 15 July 77/3 At depth the organic material is oxidised and returned to the ocean so that the shells of deep-dwelling planktonics and benthic foraminifera contain proportionally more of the lighter carbon isotope (¹²C).

This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).

单词	planktonic
释义	planktonicadj.n. Brit. /plaŋ(k)ˈtɒnɪk/, U.S. /plæŋkˈtɑnɪk/ Forms: see plankton n. and -ic suffix. Origin: Formed within English, by derivation; modelled on a German lexical item. Etymons: plankton n., -ic suffix. Etymology: < plankton n. + -ic suffix, after German planktonisch (E. Haeckel 1891, in Jenaische Zeitschr. f. Naturwiss. 25 240). Biology. A. adj. Of, relating to, characteristic of, or found in plankton; designating an organism that habitually floats or drifts in water, or a stage in the life cycle of an organism during which it does this. ΘΚΠ the world > life > biology > organism > plankton > [adjective] planktonic1893 zooplanktonic1912 planktic1947 1893 G. W. Field tr. E. Haeckel Planktonic Stud. in Rep. U.S. Comm. Fisheries 1889–91 571 I adopt the term Plankton in place of ‘Auftrieb’, and derive from it the adjective planktonic. 1899 Proc. Zool. Soc. 1029 Most, if not all, Globigerinæ, are essentially planktonic organisms. 1930 Times Educ. Suppl. 22 Mar. (Home & Classroom Suppl.) p. iv/1 Quantities of nektonic and planktonic life are being caught daily. 1963 Times 19 Feb. 10/4 Sediments of past ages..contain a boundary clearly defined by changes in their content of fossilized planktonic remains. 1974 Nature 8 Feb. 393/2 Herbivorous zooplankton can graze on planktonic algae, bacteria and detrital particles. 1992 Nature Canada Spring 33/2 Each year minke, fin, blue, and beluga whales rendezvous in the area to feast on the rich planktonic ‘soup’. B. n. (A fossil of) a planktonic organism, esp. a foraminiferan. ΘΚΠ the world > animals > invertebrates > protozoa > class Sarcodina > order Rhizopoda > [noun] > suborder Foraminifera > member of > microfossil planktonic1959 1959 Bull. Amer. Paleontol. 39 84 These assemblages of agglutinated forms..occur several times and are separated by assemblages of calcareous forms, often with abundant planktonics, suggestive of a depositional depth between 200 and 600 metres. 1964 Micropaleontology 10 3/2 The coiling characteristics of planktonics can be most useful in correlating strata from different basins and with entirely different benthic biofacies. 1989 New Scientist 15 July 77/3 At depth the organic material is oxidised and returned to the ocean so that the shells of deep-dwelling planktonics and benthic foraminifera contain proportionally more of the lighter carbon isotope (¹²C). This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < adj.n.1893
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