-loger
(lədʒə(r))
the ending of a few words which are virtually adaptations of actual or assumable Gr. words in -λόγος (L. -logus): see -logue, -logy. The oldest of these is astrologer (14th c.); it is uncertain whether this was f. L. astrolog-us + -er1 (in which case it is an unusually early example of a type of derivation afterwards common), or whether it was f. astrology + -er1 (cf. the similar formation of astronomyer, astronomer). On the analogy of this word, -loger was applied in a few instances to form personal designations correlative with words in -logy, -logic(al, as in chronologer, † geologer, philologer (obsolescent), † theologer (horologer is of different formation). The suffix is no longer a living formative, being superseded by -logist.