“red base”

We have one entry that includes the term red base.

fast red base

noun, often capitalized F&R, sometimes capitalized B

: any of several bases used as such or in the form of fast color salts in producing azoic dyes

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  • any of a genus helianthus especially h annuus of new world composite plants with large yellow rayed flower heads bearing edible seeds that yield an edible oil
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