The state of being green; the quality or condition of being unripe or immature, or of being covered with vegetation.
From the adjective green plus the suffix -age (denoting a state, condition, or collection). Similar to footage, heritage, and village.
Medieval scholars used 'greenage' to describe produce in markets, and it became particularly useful for describing fruit at different ripeness levels—ripe fruit has lost its 'greenage'!
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