| a suffix of nouns that denote a body of facts, knowledge, principles, etc., usually corresponding to adjectives ending in -ic or -ical: ethics; physics; politics; tactics. |

| -ics suff.
[-ic + -s1 (translation of Greek -ika, from neuter pl. of -ikos, adj. suff).] |
-ics suff.
Science; art; study; knowledge; skill: pharmaceutics.
Actions, activities, or practices of: macrobiotics.