Etymology
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serrate (adj.)

"notched on the edge like a saw," 1660s, from Latin serratus "sawlike, notched like a saw," from serra "a saw" (also a name of a type of serrated battle formation), a word of unknown origin. De Vaan suggests a connection to Latin sario 'to hoe, weed," and a PIE source in *sers- "cutting off." Related: Serrated; serrating.

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Definitions of serrate
1
serrate (v.)
make saw-toothed or jag the edge of;
serrate the edges of the teeth
2
serrate (adj.)
notched like a saw with teeth pointing toward the apex;
Synonyms: serrated / saw-toothed / toothed / notched
From wordnet.princeton.edu