polysiphonousadj.

Brit.

/ˌpɒlɪˈsʌɪfənəs/,

/ˌpɒlɪˈsʌɪfn̩əs/, U.S.

/ˌpɑliˈsaɪfənəs/

Origin: Formed within English, by derivation. Etymons: poly- comb. form, siphon n., -ous suffix.

Etymology: < poly- comb. form + siphon n. + -ous suffix. Compare slightly earlier monosiphonous adj. and later siphonous adj.

Botany.

1. Of an algal stem or filament: composed of several strands of large elongated cells. Of an alga: having filaments of this kind. Cf. monosiphonous adj. 1.

ΘΚΠ

the world > life > biology > physical aspects or shapes > shape > [adjective] > tube or canal

venose?a1425

venous1626

canalicular1710

tubal1822

tubuliferous1822

polysiphonous1857

meatal1868

polysiphonic1898

solenial1900

tubulosaccularc1900

siphonaceous1916

1857 M. J. Berkeley Introd. Cryptogamic Bot. §133 Of those green Algae which are masked by calcareous matter, there are two series distinguished by their monosiphonous or polysiphonous stems.

1905 Bull. Torrey Bot. Club 32 585 (caption) Part of an older branch, ventral view, showing origin of polysiphonous branchlet.

1967 Amer. Jrnl. Bot. 54 1199/2 At the tips of polysiphonous branches of C. triseriata the first pericentral cell of a given segment is cut off from the adaxial side of the segment.

1995 C. van den Hoek et al. Algae v. 92/1 The completion of the whorl..produces the ‘polysiphonous’..appearance of the alga.

2. Of a pollen grain: producing two or more pollen tubes during germination. Cf. monosiphonous adj. 2.

ΚΠ

1960 Amer. Jrnl. Bot. 47 241/1 The pollen grains are polysiphonous and although each produces 1–3 tubes, growth of 1 of these becomes dominant.

1998 Phytomorphology 48 433 The author draws the attention of plant embryologists to the behaviour of polysiphonous pollen grains during fertilization.

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

单词	polysiphonous
释义	polysiphonousadj. Brit. /ˌpɒlɪˈsʌɪfənəs/, /ˌpɒlɪˈsʌɪfn̩əs/, U.S. /ˌpɑliˈsaɪfənəs/ Origin: Formed within English, by derivation. Etymons: poly- comb. form, siphon n., -ous suffix. Etymology: < poly- comb. form + siphon n. + -ous suffix. Compare slightly earlier monosiphonous adj. and later siphonous adj. Botany. 1. Of an algal stem or filament: composed of several strands of large elongated cells. Of an alga: having filaments of this kind. Cf. monosiphonous adj. 1. ΘΚΠ the world > life > biology > physical aspects or shapes > shape > [adjective] > tube or canal venose?a1425 venous1626 canalicular1710 tubal1822 tubuliferous1822 polysiphonous1857 meatal1868 polysiphonic1898 solenial1900 tubulosaccularc1900 siphonaceous1916 1857 M. J. Berkeley Introd. Cryptogamic Bot. §133 Of those green Algae which are masked by calcareous matter, there are two series distinguished by their monosiphonous or polysiphonous stems. 1905 Bull. Torrey Bot. Club 32 585 (caption) Part of an older branch, ventral view, showing origin of polysiphonous branchlet. 1967 Amer. Jrnl. Bot. 54 1199/2 At the tips of polysiphonous branches of C. triseriata the first pericentral cell of a given segment is cut off from the adaxial side of the segment. 1995 C. van den Hoek et al. Algae v. 92/1 The completion of the whorl..produces the ‘polysiphonous’..appearance of the alga. 2. Of a pollen grain: producing two or more pollen tubes during germination. Cf. monosiphonous adj. 2. ΚΠ 1960 Amer. Jrnl. Bot. 47 241/1 The pollen grains are polysiphonous and although each produces 1–3 tubes, growth of 1 of these becomes dominant. 1998 Phytomorphology 48 433 The author draws the attention of plant embryologists to the behaviour of polysiphonous pollen grains during fertilization. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < adj.1857
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