Relating to or belonging to the Acrididae family of insects, particularly grasshoppers and locusts.
From Acrididae (the insect family name, from acrid + -id, referring to locusts) + -ian (relating to). The family name itself may derive from their harsh chirping sounds.
Acridian insects include the locusts that created biblical plagues—their name might come from their acrid, harsh sound or smell, which makes them fitting members of the 'acrid' family!
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