proprium


pro·pri·um

P0604050 (prō′prē-əm)n. pl. pro·pri·a (-prē-ə) In Aristotelian thought, a predicable property common to all members of a kind but not constituting part of the definition of that kind.
[Medieval Latin, from neuter of Latin proprius, proper (to) (translation of Greek idion); see per in Indo-European roots.]

proprium

(ˈprəʊprɪəm) n (Logic) logic obsolete Also called: property an attribute that is not essential to a species but is common and peculiar to it[C16: Latin, neuter sing of proprius proper, own]