-ics

1. Science, art, study, or knowledge of, or skill in: photonics.
2. Actions, activities, or practices of: athletics.
3. Qualities or operations of: mechanics.

[-IC + -S¹ (translation of Greek -ika , from neuter pl. of -ikos, adj. suff).]

1. Science; art; study; knowledge; skill: pharmaceutics.
2. Actions, activities, or practices of: macrobiotics.