pyrobitumen

[pahy-roh-bi-too-muh n, -tyoo-, -bich-oo-]

Origin of pyrobitumen

First recorded in 1900–05; pyro- + bitumen
Related formspy·ro·bi·tu·mi·nous, py·ro·bi·tu·mi·noid, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018