coronal suture

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The suture extending across the skull between the two parietal bones and the frontal bone.

Wiktionary

1. n. The line of junction between the frontal bone and the two parietal bones of the skull.

GNU Webster's 1913

1. adj. (Anat.) a suture extending across the skull between the parietal and frontal bones; the fronto-parietal suture.

WordNet 3.0

1. n. the suture between the parietal and frontal bones of the skull