Ob″tu‐ra′tor (?), n. [NL., fr. L. obturare to stop up: cf. F. obturateur.] 1. That which closes or stops an opening.
2. (Surg.) An apparatus designed to close an unnatural opening, as a fissure of the palate.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.