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The caterpillar stage of the double-toothed prominent (Nerice bidentata) showing its serrated back.

Double-Toothed Prominent Caterpillar

The caterpillar stage of the double-toothed prominent (Nerice bidentata) showing its serrated back.

"Or, a chief gules, indented. INDENTED. A serrated figure, much smaller than the dancette." -Hall, 1862

Chief Indented

"Or, a chief gules, indented. INDENTED. A serrated figure, much smaller than the dancette." -Hall, 1862

An illustration of a serrated knife, used to cut bread.

Serrated Knife

An illustration of a serrated knife, used to cut bread.

"A reaping hook; a curved blade of steel (anciently also of bronze) having the edge on the inner side of the curve, with a short handle or haft, for cutting with the right hand grain or grass which is grasped by the left." &mdash;Whitney, 1889 <p>This sickle has a serrated edge on the inside curve of the blade.

Sickle with Serrated Edge

"A reaping hook; a curved blade of steel (anciently also of bronze) having the edge on the inner side…