Breadcrumb Home > Dictionary > Index A Appleton layer: Meaning and Definition of Find definitions for: Ap'pleton lay"er Pronunciation: [key] — Geophysics. Geophysics. See under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Appleton apple tree borer TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: prescient Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language