rotaliformadj.

Brit.

/rəʊˈteɪlᵻfɔːm/, U.S.

/roʊˈteɪləˌfɔrm/

Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Rotalia , -form comb. form².

Etymology: < scientific Latin Rotalia (see rotalian adj.) + -form comb. form².

Zoology and Palaeontology.

Having or relating to a test or shell of a globular spiral form typical of many rotalids, in which the earlier, smaller chambers are hidden on one side by the larger, later chambers; designating a test of this form.

ΚΠ

1865 Philos. Trans. (Royal Soc.) 155 379 From 100 fathoms to shallow water..is the best home for the Rotaliform Rotalinae.

1904 R. M. Bagg in Miocene (Maryland Geol. Surv.) 467 In the normal Rotaliform arrangement of chambers the whole of the segments appear upon the superior surface and only those of the last volution on the lower aspect.

1946 H. Woods Palaeontol. Invertebr. (ed. 8) 25 Endothyra, shell free, largely calcareous; spiral, nautiloid, or rotaliform.

1994 Jrnl. Paleontol. 68 201/1 All reported specimens..to date have been of rotaliform, uniserial, or biserial structures most likely belonging to the foraminiferal suborder Rotaliina.

This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022).

单词	rotaliform
释义	rotaliformadj. Brit. /rəʊˈteɪlᵻfɔːm/, U.S. /roʊˈteɪləˌfɔrm/ Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Rotalia , -form comb. form². Etymology: < scientific Latin Rotalia (see rotalian adj.) + -form comb. form². Zoology and Palaeontology. Having or relating to a test or shell of a globular spiral form typical of many rotalids, in which the earlier, smaller chambers are hidden on one side by the larger, later chambers; designating a test of this form. ΚΠ 1865 Philos. Trans. (Royal Soc.) 155 379 From 100 fathoms to shallow water..is the best home for the Rotaliform Rotalinae. 1904 R. M. Bagg in Miocene (Maryland Geol. Surv.) 467 In the normal Rotaliform arrangement of chambers the whole of the segments appear upon the superior surface and only those of the last volution on the lower aspect. 1946 H. Woods Palaeontol. Invertebr. (ed. 8) 25 Endothyra, shell free, largely calcareous; spiral, nautiloid, or rotaliform. 1994 Jrnl. Paleontol. 68 201/1 All reported specimens..to date have been of rotaliform, uniserial, or biserial structures most likely belonging to the foraminiferal suborder Rotaliina. This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022). < adj.1865
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