プログレッシブ和英中辞典(第３版)の解説
てんちじん【天地人】
1 〔宇宙の万物〕heaven, earth, and man; (the three basic elements of) the entire cosmos
2 〔生け花で〕the idea of heaven, earth, and man as the basis of 「the rules of [the levels of flower height in] flower arrangement