Definition of prosimian
: any of a suborder (Prosimii) of lower primates (such as lemurs and lorises)
Note: The suborder Prosimii is now infrequently used in taxonomic classification. Most species, with the exception of the tarsiers, formerly grouped in the suborder Prosimii are now classified in the suborder Strepsirrhini.
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Merriam-Webster unabridged
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Time Traveler for prosimian
The first known use of prosimian was in 1873
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