clonic

is likely misspelled.

has no English definition.

As an adjective clonic

is pertaining to clonus; having irregular, convulsive spasms.

As adjectives the difference between conic and clonic

is that conic is conical while clonic is pertaining to clonus; having irregular, convulsive spasms.

As a noun conic

is (geometry) a conic section.

As a noun clinic

is a medical facility, such as a hospital, especially one for the treatment and diagnosis of outpatients.

As an adjective clonic is

pertaining to clonus; having irregular, convulsive spasms.

As adjectives the difference between clonic and colonic

is that clonic is pertaining to clonus; having irregular, convulsive spasms while colonic is of, relating to, affecting or within the colon.

As a noun colonic is

colonic irrigation.