To speak in baby talk (form of speech used by adults in talking to very young children).

present participle of self-scan

(anatomy) The basic structural and functional unit of the kidney, which filters the blood in order to regulate chemical concentrations, and thereby produces urine.

(informal) Criticism. / (informal) Critique. / (informal) A proponent of critical legal studies. / (cycling) A criterium race. / (slang, role-playing games) A critical hit.