톱니 모양의 구조나 기관.
A serrated or saw-like part, organ, or structure in a biological organism.
예문:
"The biologist identified a serra on the specimen's mandible."
"A serra helps the organism filter nutrients from the water."
톱니 모양의 산맥이나 구릉.
A range of mountains or hills with a jagged or serrated profile.
예문:
"The sun set behind the distant serra, casting long shadows."
"The local serra is known for its unique granite formations."