祖先形質 そせんけいしつ Meanings Noun plesiomorphy; ancestral character Kanji 祖 ancestor. Read as ソ. 先 ahead. Read as セン. 形 shape. Read as ケイ. 質 quality. Read as シツ. Words containing 祖先形質 祖先形質共有 (そせんけいしつきょうゆう) symplesiomorphy Jinuma: Japanese Dictionary · Word lists