-logy \-lo*gy\ [Gr. ?, fr. ? word, discourse, fr. ? to speak. See Logic.]

A combining form denoting a discourse, treatise, doctrine, theory, science; as, theology, geology, biology, mineralogy.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Logy \Lo"gy\, a. [From D. log.]

Heavy or dull in respect to motion or thought; as, a logy horse. [U.S.]

Porcupines are . . . logy, sluggish creatures. --C. H. Merriam.

Source: Webster's Revised Unabridged Dictionary (1913)