planorbiformadj.

Brit.

/pləˈnɔːbᵻfɔːm/, U.S.

/pləˈnɔrbəˌfɔrm/

Origin: Formed within English, by compounding. Etymons: Planorbis n., -iform comb. form.

Etymology: < Planorbis n. + -iform comb. form. Compare planorboid adj.

Zoology and Palaeontology.

Having the form of a snail of the genus Planorbis; of the shape of a rounded plane spiral.

ΘΚΠ

the world > space > shape > curvature > coil > [adjective] > spiral or helical > spiral

spirala1639

gyrous1688

planorbiform1856

planorboid1856

pinwheel1887

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Mollusca > [adjective] > of parts of molluscs > of shell or parts of shell

testaceous1668

trivalvous1681

articulate1685

tabulous1734

concamerated1747

costated1751

ribbed1752

multivalve1753

umbilical1755

multivalved1759

trichite1765

right-handed1776

ventricose1777

unequivalved1788

sinistral1803

white-lipped1813

white-mouthed1815

turriculated1822

umbonial1824

turreted1826

siphunculated1828

columellar1829

sinistrorsal1830

canaliferous1834

spirivalve1835

turrited1835

versant1839

mitriform1843

paucispiral1843

turriculate1843

siphuncled1847

ventricous1850

camerated1851

convolute1851

perforated1851

parietal1854

septiferous1854

planorbiform1856

planorboid1856

trivalved1856

turrite1856

siphunculate1875

turriform1875

umbonic1877

costate1881

interlocular1888

varicated1891

lirate1894

evolute1896

1856 C. Lyell Let. 23 Aug. in Life, Lett. & Jrnls. (1881) II. xxviii. 222 A very singular planorbiform variety of Helix lapicida.

1895 Cambr. Nat. Hist. III. 413 Shell very small, planorbiform.

1968 Jrnl. Paleontol. 42 1007 Study of the opercular shape and growth pattern suggests that it was associated in life with a helicoidal..or planorbiform spiral shell.

1990 Lethaia 23 297 Studies of the planorbiform or trochiform protoconch reveal a shell wall comprising three calcite layers.

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

单词	planorbiform
释义	planorbiformadj. Brit. /pləˈnɔːbᵻfɔːm/, U.S. /pləˈnɔrbəˌfɔrm/ Origin: Formed within English, by compounding. Etymons: Planorbis n., -iform comb. form. Etymology: < Planorbis n. + -iform comb. form. Compare planorboid adj. Zoology and Palaeontology. Having the form of a snail of the genus Planorbis; of the shape of a rounded plane spiral. ΘΚΠ the world > space > shape > curvature > coil > [adjective] > spiral or helical > spiral spirala1639 gyrous1688 planorbiform1856 planorboid1856 pinwheel1887 the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Mollusca > [adjective] > of parts of molluscs > of shell or parts of shell testaceous1668 trivalvous1681 articulate1685 tabulous1734 concamerated1747 costated1751 ribbed1752 multivalve1753 umbilical1755 multivalved1759 trichite1765 right-handed1776 ventricose1777 unequivalved1788 sinistral1803 white-lipped1813 white-mouthed1815 turriculated1822 umbonial1824 turreted1826 siphunculated1828 columellar1829 sinistrorsal1830 canaliferous1834 spirivalve1835 turrited1835 versant1839 mitriform1843 paucispiral1843 turriculate1843 siphuncled1847 ventricous1850 camerated1851 convolute1851 perforated1851 parietal1854 septiferous1854 planorbiform1856 planorboid1856 trivalved1856 turrite1856 siphunculate1875 turriform1875 umbonic1877 costate1881 interlocular1888 varicated1891 lirate1894 evolute1896 1856 C. Lyell Let. 23 Aug. in Life, Lett. & Jrnls. (1881) II. xxviii. 222 A very singular planorbiform variety of Helix lapicida. 1895 Cambr. Nat. Hist. III. 413 Shell very small, planorbiform. 1968 Jrnl. Paleontol. 42 1007 Study of the opercular shape and growth pattern suggests that it was associated in life with a helicoidal..or planorbiform spiral shell. 1990 Lethaia 23 297 Studies of the planorbiform or trochiform protoconch reveal a shell wall comprising three calcite layers. This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < adj.1856
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