The Collaborative International Dictionary of English v.0.48:

-oid \-oid\ (-oid) suff. [Gr. ?, fr. e'i^dos form, akin to ? to
   see, and E. wit: cf. F. -o["i]de, L. -o["i]des.]
   A suffix or combining form meaning like, resembling, in the
   form of; as in anthropoid, asteroid, spheroid.
   [1913 Webster]

The Free On-line Dictionary of Computing (19 January 2023):

object identifier
OID

    (OID) Generally an implementation-specific
   integer or pointer that uniquely identifies an object.

   (1999-07-10)