a combining form meaning “cut, divided,” used in the formation of compound words:
a combining form meaning “cutting, incision” of an organ, “excision” of an object, as specified by the initial element (appendectomy; lithotomy); also occurring in abstract nouns corresponding to adjectives ending in -tomous, (dichotomy). compare -tome, tomo-, -tomous. -tomy combining form indicating a surgical cutting of a specified part or tissue lobotomy word origin from greek […]
a suffix formerly used to form nouns from adjectives: simpleton; singleton.
a combining form with the meaning “muscle tension, nerve tension,” as specified by the initial element (hypertonia); used also in the formation of words that denote more generally a personality type or personality disorder (catatonia; somatotonia). -tonia suff. degree or state of tonicity: myotonia.
a combining form occurring in adjectives that correspond to nouns ending in -tonia: catatonic.
a suffix found in loanwords from latin, forming personal agent nouns from verbs and, less commonly, from nouns: dictator; genitor; janitor; orator; victor.