geometer moth; geometrid
Refers to moths of the family Geometridae, known for their looping caterpillar movement. The term is used in both everyday and scientific contexts.
I found a geometer moth caterpillar in the garden.
Geometer moths rest with their wings spread out.
Kana spelling is the usual written form in general use.
尺 (shaku, a unit of length) + 蛾 (ga, moth), referring to the caterpillar's looping gait that resembles measuring with a ruler. The exact historical derivation is uncertain.