In Scandinavian and Celtic lore, the acorn is the symbol of androgyny, life, fecundity, and immortality and is sacred to Thor. According to Jobes (1961), the acorn is "a combination of I, the holy one, and O, the generative orator or cup". The acorn also represents the male principle. The acorn is associated with Jupiter and Zeus as the fruit of the oak, the holy tree, and represents fertilizing power and the kernel of life. In heraldry, the acorn symbolizes strength.
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