novocaine. A synthetic local anesthetic.
noxious. Injurious; harmful.
nucleus. The essential part of a typical cell and the controlling centre of its activity.
O
obliteration. Extinction.
official (in pharmacy). Authoritative; standard.
oid. Like, as in lymphoid, resembling or like lymph.
oil. A liquid of fatty consistency, insoluble in water and inflammable. Examples: camphorated oil, carbolic oil, carron oil, linseed oil, oil of turpentine, sweet oil, sesame oil, tar oil.
ointment. A soft, fatty, medicated mixture.
onychauxis. Enlargement of finger or of toe nails.