a natural, solid hydrocarbon having a melting point higher than that of asphalt.
any of various naturally occurring hydrocarbons that resemble asphalt but have a higher melting point
n. 1721, noun of action from asperate (v.). Asperacioun “harshness” is attested from early 15c.
to make rough, harsh, or uneven: a voice asperated by violent emotion. Historical Examples But in the ordinary life there in my time there was little to “asperate” the douceur. A History of the French Novel, Vol. 2 George Saintsbury adjective (of plant parts) having a rough surface due to a covering of short stiff […]
to make rough, harsh, or uneven: a voice asperated by violent emotion. adjective (of plant parts) having a rough surface due to a covering of short stiff hairs v. 1650s, “make rough,” from Latin asperatus, past participle of asperare “to roughen, make rough, exasperate,” from asper “rough” (see asperity). Related: Asperated; asperating.
. Historical Examples The conductors having been drawn in, a preparation of asphaltum and linseed oil was forced into the piping to serve as insulation. The Wonder Book of Knowledge Various The paving, or repaving, of all the streets with the best quality of asphaltum. Industrial Cuba Robert P. Porter Clean the case thoroughly and […]
(of a reflecting surface or lens) deviating slightly from a perfectly shape and relatively free from aberrations.