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Related to oil beetle: blister beetle
Any of various blister beetles of the genus Meloe that exude an oily yellow substance from the joints of the legs when disturbed.
(Animals) any of various beetles of the family Meloidae that exude an oily evil-smelling blood from their joints, which deters enemies
any of several blister beetles of the genus Meloe that exude oily fluid from their leg joints when disturbed.