pumiciten.

Brit.

/ˈpʌmɪsʌɪt/, U.S.

/ˈpəməˌsaɪt/

Origin: Formed within English, by derivation. Etymons: pumice n., -ite suffix¹.

Etymology: < pumice n. + -ite suffix¹. Perhaps compare French pumicite pumice (1842; in geological and mineralogical use, as a technical synonym of pierre ponce : see pumice stone n.).

Geology.

A volcanic ash with a composition similar to pumice but deposited as powder or granules, widely used in the manufacture of lightweight concrete and for its abrasive properties; unconsolidated volcanic ash.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > ejected volcanic material > [noun] > ash

ash1667

pozzolana1684

volcanic ash1776

trinacrite1854

Santorin earth1868

pumicite1916

1916 E. H. Barbour in Nebraska Geol. Surv. IV. 358 Pumicite has been variously called geyserite, volcanic dust.., and the like... For all of these we have substituted the name pumicite, a self-explanatory term, which we have used for some years.

1947 Reno (Nevada) Evening Gaz. 5 June 6/2 As a raw material, volcanic ash fulfils the industrialist's fondest desires. The fine gray dust, called pumicite by chemists, is found in Oklahoma.

1974 A. C. Tennissen Nature of Earth Materials vii. 394 Finely ground pumice and unground pumicite are used in general scouring powders... Other uses for unground pumicite and ground pumicite are..in insulation, as filter aids, as poultry litter, [etc.].

2004 Cement & Concrete Res. 34 2277/1 Natural pozzolans..(e.g. volcanic ash or pumicite.., tuffs, and some diatomaceaous earths)..are among the oldest materials..used for construction purposes.

This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).

单词	pumicite
释义	pumiciten. Brit. /ˈpʌmɪsʌɪt/, U.S. /ˈpəməˌsaɪt/ Origin: Formed within English, by derivation. Etymons: pumice n., -ite suffix¹. Etymology: < pumice n. + -ite suffix¹. Perhaps compare French pumicite pumice (1842; in geological and mineralogical use, as a technical synonym of pierre ponce : see pumice stone n.). Geology. A volcanic ash with a composition similar to pumice but deposited as powder or granules, widely used in the manufacture of lightweight concrete and for its abrasive properties; unconsolidated volcanic ash. ΘΚΠ the world > the earth > structure of the earth > constituent materials > ejected volcanic material > [noun] > ash ash1667 pozzolana1684 volcanic ash1776 trinacrite1854 Santorin earth1868 pumicite1916 1916 E. H. Barbour in Nebraska Geol. Surv. IV. 358 Pumicite has been variously called geyserite, volcanic dust.., and the like... For all of these we have substituted the name pumicite, a self-explanatory term, which we have used for some years. 1947 Reno (Nevada) Evening Gaz. 5 June 6/2 As a raw material, volcanic ash fulfils the industrialist's fondest desires. The fine gray dust, called pumicite by chemists, is found in Oklahoma. 1974 A. C. Tennissen Nature of Earth Materials vii. 394 Finely ground pumice and unground pumicite are used in general scouring powders... Other uses for unground pumicite and ground pumicite are..in insulation, as filter aids, as poultry litter, [etc.]. 2004 Cement & Concrete Res. 34 2277/1 Natural pozzolans..(e.g. volcanic ash or pumicite.., tuffs, and some diatomaceaous earths)..are among the oldest materials..used for construction purposes. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < n.1916
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