What is the meaning of Sorrel?

Any of various plants with acidic leaves of the genus Rumex, especially

1. Rumex acetosa (common sorrel, garden sorrel), sometimes used as a salad vegetable.

Rumex acetosa (common sorrel, garden sorrel), sometimes used as a salad vegetable.

Members of genus Oxalis or family Oxalidaceae, woodsorrels.

The roselle, Hibiscus sabdariffa.

1. A drink, consumed especially in the Caribbean around Christmas, made from the flowers of Hibiscus sabdariffa: hibiscus tea.

A drink, consumed especially in the Caribbean around Christmas, made from the flowers of Hibiscus sabdariffa: hibiscus tea.

A brown colour, with a tint of red.

Of a brown colour, with a tint of red.

Source: wiktionary.org