present of spark test

plural of spark test

(metalworking) To test for the general character of a steel, when testing a piece of steel, by grinding it, producing sparks, using color of sparks to determine its general classification.

An instance of spark testing.

(UK) Completely asleep or unconscious.

(transitive, colloquial) To render unconscious; to knock out.

plural of spark arrester

Alternative form of spark arrestor

(ichthyology) A type of occular radiance, which is the redirection of infalling light from above, reflecting it into the visual field to illuminate the field of vision, for diurnal active photolocation.

simple past tense and past participle of spark up