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say it: pahy-NEE-uhl
pineal is an adjective meaning "relating to the pineal body". It carries 2 recorded senses.
relating to the pineal body
“pineal hormone”
having the form of a pine cone
Definitions, synonyms and semantic relations for pineal come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.