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increscent
incriminate
incross
incrust
incubate
incubation
incubation period
incubator
incubus
incudes
incue
inculcate
inculpable
inculpate
incumbency
incumbent
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incubus

in·cu·bus [ íngkyəbəss ] (plural in·cu·bi [ íngkyə b ] or in·cu·bus·es)


noun 
Definition:
 
1. cause of mental distress: something that causes somebody much worry or anxiety, especially a nightmare or obsession ( literary )

2. male demon having sex with women: in medieval times, a male demon that was believed to have sexual intercourse with women while they were asleep

[14th century. < late Latin, "nightmare" < Latin incubare (see incubate)]
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