adj. On the side of a tooth which mates with the opposing tooth.
The Century Dictionary and Cyclopedia
Same as morsal: noting the biting or grinding surface of a tooth.
Word Usage
"Michael credits luck with getting past some of the trickier words that few 14-year-olds have great occasion to drop in conversation, like "occlusal," but he admits he's fond of reading "old stuff" such as "Beowulf" and "Romeo and Juliet.""