periodontology

[ per-ee-oh-don-tol-uh-jee ]
/ ˌpɛr i oʊ dɒnˈtɒl ə dʒi /

noun

Origin of periodontology

1910–15; periodont(ia) + -o- + -logy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019