trass

American  

[tras] / træs /

noun

1. a light-colored type of volcanic tuff used in making water-resistant cement and mortar.

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trass British  

/ træs /

noun

1. a variety of the volcanic rock tuff, used to make a hydraulic cement

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Etymology

Origin of trass

First recorded in 1790–1800; from Dutch trass, from earlier terass, tieras, tiras “brick dust, rubbish,” from French terrasse; see terrace ( def. )

Example Sentences

See Examples For:

trass

Forests might be torn up by such a flood, and thus the occurrence of the numerous trunks of trees dispersed irregularly through the trass can be explained.

From The Student's Elements of Geology by Lyell, Charles, Sir

The village of Nippes owes its origin to the trade in trass, having been founded by a Dutchman, who settled there about a century ago for the convenience of exportation.

From The Mirror of Literature, Amusement, and Instruction Volume 12, No. 326, August 9, 1828 by Various

The idea of the trass having any connexion with a deluge, is, I believe, now exploded; and geologists have agreed that it is the actual substance ejected by the volcano, subsided into a firm paste.

From The Mirror of Literature, Amusement, and Instruction Volume 12, No. 326, August 9, 1828 by Various

When lime is used as a matrix, certain natural earths such as pozzuolana or trass, or, failing these, powdered bricks or tiles, may be used instead of sand with great advantage.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 7 "Columbus" to "Condottiere" by Various

Mixing very finely-ground silica, or trass, with the cement proved an advantage where a weak mixture was employed, but in the other cases no benefit was observed.

From The Sewerage of Sea Coast Towns by Adams, Henry C.