The story
From ironclad + beetle, from their especially hard exoskeletons.
Etymology from Wiktionary, CC BY-SA 4.0.
ironclad beetle
Today it means: Any beetle of the subfamily Zopherinae which have exceedingly durable exoskeletons. Full definition →
Today it means: Any beetle of the subfamily Zopherinae which have exceedingly durable exoskeletons. Full definition →
From ironclad + beetle, from their especially hard exoskeletons.
Etymology from Wiktionary, CC BY-SA 4.0.