octamerousadj.

Brit.

/ɒkˈtam(ə)rəs/, U.S.

/ɑkˈtæm(ə)rəs/

Forms: 1800s– octamerous, 1800s– octomerous. Also represented by the abbreviation 8-merous.

Origin: Formed within English, by compounding. Etymons: octa- comb. form, -merous comb. form.

Etymology: < octa- comb. form + -merous comb. form. Compare Hellenistic Greek ὀκταμερής of or in eight parts (in Diogenes Laertius).With the form octomerous (which implies a pronunciation /ɒktˈɒmərəs/) compare octo- comb. form and see discussion s.v. octa- comb. form. The form 8-merous may imply either pronunciation; perhaps compare also five-merous adj.

Chiefly Botany and Zoology.

Having parts arranged in groups of eight; having eight parts of a particular type.

ΘΚΠ

the world > animals > invertebrates > Radiata > [adjective] > having eight radiating parts

octamerous1857

octomeral1871

the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [adjective] > having specific arrangement or number of member parts

regular1760

decandrous1808

irregular1826

tetramerous1835

pentamerous1848

symmetrical1849

hexamerous1857

isomerous1857

octamerous1857

anisomerous1861

octomeral1871

hemicyclic1875

zygomorphic1875

zygomorphous1879

tetracyclic1880

heteromerous1882

heterocyclic1895

oligomerous1897

pleiomerous1898

decasepalous-

1857 A. Henfrey Elem. Course Bot. 405 Herbs with..regular 8-merous and 6-androus flowers.

1864 in Webster's Amer. Dict. Eng. Lang. Octamerous (Bot.), having the parts in eights. Gray.

1877 T. H. Huxley Man. Anat. Invertebrated Animals iii. 159 The finally hexamerous Anthozoon passes through a tetramerous and an octomerous stage.

1922 Amer. Midland Naturalist 8 109 One case is known in which a single octomerous flower occurred.

1966 Amer. Jrnl. Bot. 53 835/2 Brown described a flower of C[orokia] collenettei with 8-merous calyx, corolla, and androecium.

1999 Jrnl. Marine Biol. Assoc. 79 993 While it is generally assumed that jellyfishes (Cnidaria: Scyphozoa) are stably tetramerous, variation in symmetry (i.e. unimerous to octamerous) can be observed.

This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).

单词	octamerous
释义	octamerousadj. Brit. /ɒkˈtam(ə)rəs/, U.S. /ɑkˈtæm(ə)rəs/ Forms: 1800s– octamerous, 1800s– octomerous. Also represented by the abbreviation 8-merous. Origin: Formed within English, by compounding. Etymons: octa- comb. form, -merous comb. form. Etymology: < octa- comb. form + -merous comb. form. Compare Hellenistic Greek ὀκταμερής of or in eight parts (in Diogenes Laertius).With the form octomerous (which implies a pronunciation /ɒktˈɒmərəs/) compare octo- comb. form and see discussion s.v. octa- comb. form. The form 8-merous may imply either pronunciation; perhaps compare also five-merous adj. Chiefly Botany and Zoology. Having parts arranged in groups of eight; having eight parts of a particular type. ΘΚΠ the world > animals > invertebrates > Radiata > [adjective] > having eight radiating parts octamerous1857 octomeral1871 the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [adjective] > having specific arrangement or number of member parts regular1760 decandrous1808 irregular1826 tetramerous1835 pentamerous1848 symmetrical1849 hexamerous1857 isomerous1857 octamerous1857 anisomerous1861 octomeral1871 hemicyclic1875 zygomorphic1875 zygomorphous1879 tetracyclic1880 heteromerous1882 heterocyclic1895 oligomerous1897 pleiomerous1898 decasepalous- 1857 A. Henfrey Elem. Course Bot. 405 Herbs with..regular 8-merous and 6-androus flowers. 1864 in Webster's Amer. Dict. Eng. Lang. Octamerous (Bot.), having the parts in eights. Gray. 1877 T. H. Huxley Man. Anat. Invertebrated Animals iii. 159 The finally hexamerous Anthozoon passes through a tetramerous and an octomerous stage. 1922 Amer. Midland Naturalist 8 109 One case is known in which a single octomerous flower occurred. 1966 Amer. Jrnl. Bot. 53 835/2 Brown described a flower of C[orokia] collenettei with 8-merous calyx, corolla, and androecium. 1999 Jrnl. Marine Biol. Assoc. 79 993 While it is generally assumed that jellyfishes (Cnidaria: Scyphozoa) are stably tetramerous, variation in symmetry (i.e. unimerous to octamerous) can be observed. This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022). < adj.1857
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