trass
/tras
/(also tarras)
noun [mass noun]
A light-coloured variety of volcanic ash resembling pozzolana, used in making water-resistant cement.Although usually of lead, in Deptford the cooler was made of tarras, a cement which, like lead, did not dissolve in the acidic solution.
Origin
Late 18th century: from Dutch tras, German Trass, based on Latin terra 'earth'.
- propodial
- propodite
- propodium
- propodus
- propofol
- propolis
- propolize
- propone
- proponent
- Propontic
- Propontis
- proport
- proportion
- proportionability
- proportionable
- proportionableness
- proportionably
- proportional
- proportional compass
- proportional counter
- proportional counting
- proportionalism
- proportionalist
- proportionality
- proportionality constant