individuator
/ˌɪndɪˈvɪdʒʊeɪtə/ /ˌɪndɪˈvɪdjʊeɪtə/noun
A person who or thing which individuates.
- Apparently not attested in the 18th cent., and only recorded in dictionaries in the 19th cent..
Origin
Mid 17th century; earliest use found in Kenelm Digby (1603–1665), natural philosopher and courtier. From individuate + -or.