Simple past tense and past participle of cog.(verb)
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Use "cogged" in a sentence
"In the course of a few days after his arrival he made a kind of cogged or saw-toothed type, the object of which I understood was to regulate the interruptions of the electric current, so as to enable him to make dots, and regulate the length of marks or spaces on the paper upon which the information transmitted by his telegraph was to be recorded."
"Miss Delany tripped past me in her sky-blue tights to hold the audience spellbound with her jugglery, and spin plates and throw glittering knives until the satiated people turned to welcome Horan and his "cogged" dumbbells and clubs."
"a "cogged" billet and is of the proper size for the rolling mill or for the finishing hammer."