Japanese edit

Etymology 1 edit

For pronunciation and definitions of トンボ – see the following entry.
蜻蛉とんぼ
[noun] dragonfly
Alternative spelling
蜻蜓
(This term, トンボ, is the katakana spelling of the above term.)

Etymology 2 edit

 
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Noun edit

トンボ (tonbo

  1. (printing) register mark (marking used to indicate margins, positions for cropping, etc.)