Found 2 items, similar to lifeblood.
English → English (WordNet) Definition: lifeblood lifeblood n 1: the blood considered as the seat of vitality 2: an essential or life-giving force; “water is the lifeblood of India”
English → English (gcide) Definition: Lifeblood Lifeblood \Life"blood`\ (l[imac]f"bl[u^]d`), n. 1. The blood necessary to life; vital blood. --Dryden. [1913 Webster] 2. Fig.: That which gives strength and energy. [1913 Webster] Money [is] the lifeblood of the nation. --Swift. [1913 Webster]