| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
noninvasive non·in·va·sive (nŏn'ĭn-vā'sĭv)
adj.
Not penetrating the body, as by incision. Used especially of a diagnostic procedure.
Not invading healthy tissue.