A word formed from the Latin luna, the moon, and thus corresponding to the original Greek word and to the English "moonstruck;" applied to a class of persons mentally and often corporally diseased, who were believed to suffer most when the moon was full. Inanity, epilepsy, and morbid melancholy were among the frequent effects of demoniac possession, yet this possession existed independently of these effects, and was a more dreadful calamity. Lunatics are expressly mentioned in distinction from men possessed by evil spirits, Matthew 4:24 17:15 . See DEVILS.
Although written in 1859 by William Rand, this dictionary of the Bible from the American Tract Society is still relevant today.Wikipedia
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