backboneless
On opposite sides of a junction
Not debriefed.
Without a backbone; invertebrate. / Cowardly, spineless.
(entomology) pertaining to an insect that undergoes sexual reproduction during at least part of its life cycle.
公園の学芸員は、来館者に無脊椎動物の多様性を教えるために背骨のない標本を展示した。
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