The Collaborative International Dictionary
Leptology
Leptology \Lep*tol"o*gy\ (l[e^]p*t[o^]l"[-o]*j[y^]), n. [Gr. leptologi`a; lepto`s small, subtile + lo`gos discourse.] A minute and tedious discourse on trifling things.
Wiktionary
leptology
n. 1 A minute and tedious discourse on trifling things. 2 crystallography