metachronaladj.

Brit.

/ˌmɛtəˈkrəʊnl/, U.S.

/ˌmɛdəˈkroʊn(ə)l/

Origin: A borrowing from Greek, combined with English elements; modelled on a German lexical item. Etymons: meta- prefix, Greek χρόνος , -al suffix¹.

Etymology: < meta- prefix + ancient Greek χρόνος (see chronic adj.) + -al suffix¹, after German metachron (M. Verworn 1891, in Arch. f. die gesamte Physiol. 48 152). Compare metachronism n., and slightly earlier metachronous adj.

Biology.

Occurring sequentially, in a regular order; of the nature of, characteristic of, or exhibiting metachrony.

ΘΚΠ

the world > life > biology > biological processes > movement > [adjective] > co-ordinated movement

metachronous1903

metachronal1905

1905 Jrnl. Exper. Zool. 2 407 The cause of metachronal action is..to be sought..in the mechanical effect of one cilium on another.

1928 J. Gray Ciliary Movem. vii. 118 Although the direction of the metachronal wave..differs in different tissues, it is remarkably constant in each particular case.

1940 G. S. Carter Gen. Zool. Invertebr. viii. 359 Metachronal rhythm is not confined to metazoan cilia; it can be well seen in such ciliate protistans as Opalina.

1962 D. Nichols Echinoderms viii. 99 In at least one urchin, Diadema, the spines show metachronal rhythm during locomotion, and they move the animal across the ocean floor with considerable speed.

1966 Ecology 47 322 Then the capsule is transposed to the posterior end of the animal [sc. the milliped Narceus annularis] by a metachronal movement of the legs.

1990 Jrnl. Plankton Res. 12 1281 Mysids..are propelled by the metachronal paddling of their peripods.

Derivatives

metaˈchronally adv.

ΘΚΠ

the world > life > biology > biological processes > movement > [adverb] > co-ordinated movement

metachronally1905

1905 Jrnl. Exper. Zool. 2 407 These swimming plates are arranged in rows and the members of each row, like ordinary cilia, beat metachronally, not synchronally.

1990 Jrnl. Plankton Res. 12 1279 Mysids actively swam vertically upwards and downwards using their thoracic appendages which beat metachronally.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	metachronal
释义	metachronaladj. Brit. /ˌmɛtəˈkrəʊnl/, U.S. /ˌmɛdəˈkroʊn(ə)l/ Origin: A borrowing from Greek, combined with English elements; modelled on a German lexical item. Etymons: meta- prefix, Greek χρόνος , -al suffix¹. Etymology: < meta- prefix + ancient Greek χρόνος (see chronic adj.) + -al suffix¹, after German metachron (M. Verworn 1891, in Arch. f. die gesamte Physiol. 48 152). Compare metachronism n., and slightly earlier metachronous adj. Biology. Occurring sequentially, in a regular order; of the nature of, characteristic of, or exhibiting metachrony. ΘΚΠ the world > life > biology > biological processes > movement > [adjective] > co-ordinated movement metachronous1903 metachronal1905 1905 Jrnl. Exper. Zool. 2 407 The cause of metachronal action is..to be sought..in the mechanical effect of one cilium on another. 1928 J. Gray Ciliary Movem. vii. 118 Although the direction of the metachronal wave..differs in different tissues, it is remarkably constant in each particular case. 1940 G. S. Carter Gen. Zool. Invertebr. viii. 359 Metachronal rhythm is not confined to metazoan cilia; it can be well seen in such ciliate protistans as Opalina. 1962 D. Nichols Echinoderms viii. 99 In at least one urchin, Diadema, the spines show metachronal rhythm during locomotion, and they move the animal across the ocean floor with considerable speed. 1966 Ecology 47 322 Then the capsule is transposed to the posterior end of the animal [sc. the milliped Narceus annularis] by a metachronal movement of the legs. 1990 Jrnl. Plankton Res. 12 1281 Mysids..are propelled by the metachronal paddling of their peripods. Derivatives metaˈchronally adv. ΘΚΠ the world > life > biology > biological processes > movement > [adverb] > co-ordinated movement metachronally1905 1905 Jrnl. Exper. Zool. 2 407 These swimming plates are arranged in rows and the members of each row, like ordinary cilia, beat metachronally, not synchronally. 1990 Jrnl. Plankton Res. 12 1279 Mysids actively swam vertically upwards and downwards using their thoracic appendages which beat metachronally. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < adj.1905
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