Quaternary
01
四, 四元
the cardinal number that is the sum of three and one
02
第四紀, 第四紀時代
last 2 million years
quaternary
01
第四の, 四番目の
coming next after the third and just before the fifth in position or time or degree or magnitude
02
四つの、四つから成るまたは特に四つで構成される
consisting of or especially arranged in sets of four
