One of the mysteries of the English language finally explained.
1Entomology. Designating insects which, unlike related species, have no worker caste, especially certain ants and bees that parasitize the colonies of social species.
2Having no workers. Now especially: (of a business, factory, etc.) wholly automated, so as to make human workers unnecessary.
Late 19th century; earliest use found in Churchman. From worker + -less.
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