trapdoor spider

any of various, often large, spiders (esp. family Ctenizidae) that dig a burrow and cover the entrance with a hinged lid like a trapdoor

See trapdoor spider in American Heritage Dictionary 4

noun

Any of various insect-eating spiders of the family Ctenizidae, found in warm climates, that construct a silk-lined burrow concealed by a hinged lid.

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