pentameroidadj.n.

Brit.

/pɛnˈtamərɔɪd/, U.S.

/pɛnˈtæməˌrɔɪd/

Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Pentamerus , -oid suffix.

Etymology: < scientific Latin Pentamerus (see pentameral adj.¹) + -oid suffix. Compare scientific Latin Pentameroidea, superfamily name (C. Schuchert & G. A. Cooper (1931) in Amer. Jrnl. Sci. 22 247, originally as suborder name).

Palaeontology.

A. adj.

Of or relating to the extinct superfamily Pentameroidea or family Pentameridae of articulate brachiopods having roughly pentagonal shells, known from fossils of Ordovician to Devonian age.

ΚΠ

1875 Amer. Cycl. XII. 812/1 The pentameroid forms begin in the Trenton and disappear in the Devonian.

1986 Canad. Jrnl. Earth Sci. 23 1438/2 He has observed well-preserved specimens belonging to most of the pentameroid genera.

B. n.

A pentameroid brachiopod.

ΚΠ

1890 Cent. Dict. 4379/3 Pentameroid, a brachiopod of the family Pentameridæ.

1961 J. Stubblefield Davies's Introd. Palaeontol. (ed. 3) i. 24 Pentameroids, a group of brachiopods which migrated in force into the British area at the opening of the Silurian period.

1979 Paleobiology 5 139/1 A greater percentage of short-lived, reef-associated genera among the pentameroids would account for the comparatively low MGL [mean generic longevity] value relative to the orthids, spiriferids and strophomenids.

This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).

单词	pentameroid
释义	pentameroidadj.n. Brit. /pɛnˈtamərɔɪd/, U.S. /pɛnˈtæməˌrɔɪd/ Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Pentamerus , -oid suffix. Etymology: < scientific Latin Pentamerus (see pentameral adj.¹) + -oid suffix. Compare scientific Latin Pentameroidea, superfamily name (C. Schuchert & G. A. Cooper (1931) in Amer. Jrnl. Sci. 22 247, originally as suborder name). Palaeontology. A. adj. Of or relating to the extinct superfamily Pentameroidea or family Pentameridae of articulate brachiopods having roughly pentagonal shells, known from fossils of Ordovician to Devonian age. ΚΠ 1875 Amer. Cycl. XII. 812/1 The pentameroid forms begin in the Trenton and disappear in the Devonian. 1986 Canad. Jrnl. Earth Sci. 23 1438/2 He has observed well-preserved specimens belonging to most of the pentameroid genera. B. n. A pentameroid brachiopod. ΚΠ 1890 Cent. Dict. 4379/3 Pentameroid, a brachiopod of the family Pentameridæ. 1961 J. Stubblefield Davies's Introd. Palaeontol. (ed. 3) i. 24 Pentameroids, a group of brachiopods which migrated in force into the British area at the opening of the Silurian period. 1979 Paleobiology 5 139/1 A greater percentage of short-lived, reef-associated genera among the pentameroids would account for the comparatively low MGL [mean generic longevity] value relative to the orthids, spiriferids and strophomenids. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). < adj.n.1875
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