系

ケイ

系, 丿, 糸

糸

lineage, system

体系(たいけい): system; organization; organisation; architecture
系統(けいとう): system; family line; geological formation; lineage; ancestry
系(けい): (1) system; lineage; group (2) corollary (3) (geological) system (range of strata that correspond to a particular time period) (4) (taxonomical) series