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Definition of Occipitomastoid suture
1. Noun. The suture between the occipital and the temporal bones; a continuation of the lamboid suture.
Medical Definition of Occipitomastoid suture
1. Continuation of the lambdoid suture between the posterior border of the petrous portion of the temporal bone and the occipital. Synonym: sutura occipitomastoidea. (05 Mar 2000)