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chronological 1 today according to the order in which things happen. Main Int.
krypton 1 today an inert gaseous chemical element that has thirty-six protons in each nucleus, used esp. as the atmosphere in high-powered light bulbs. (symbol: Kr) Main Adv.
year 1 today a unit of time equal to 365 days or, every fourth year, 366 days, from January through December; twelve months. (abbreviated: yr.) [4 definitions] Kids Ch.
coordinate 1 today (plural) a pair of numbers that identifies a point on a graph or grid; ordered pair. [3 definitions] Kids Ch.
advance 1 today to move or send forward. [14 definitions] Main Adv.