An Etymological Dictionary of Astronomy and Astrophysics

A combining form used in the names of sciences or bodies of knowledge, such as → biology, → geology, → cosmology. See also → -ics.

Etymology (EN): M.E. -logie, from O.Fr. -logie, from L. -logia, from Gk. -logia, from legein “to speak, tell over; to choose, gather,” logos “word, speech, thought, account.”

Etymology (PE): -Šenâsi, from šenâs, present stem of šenâsidan, šenâxtan “to know, discern, distinguish, be acquainted with;”
Mid.Pers. šnâxtan, šnâs- “to know, recognize,” dânistan “to know;” O.Pers./Av. xšnā- “to know, learn, come to know, recognize;”
cf. Skt. jñā- “to recognize, know,” jānāti “he knows;” Gk. gignoskein “to know, think, judge;” L. gnoscere, noscere “to come to know” (Fr. connaître; Sp. conocer); P.Gmc. *knoeanan; O.E. cnawan; E. know; Rus. znat “to know;” PIE base *gno- “to know.”