| n.  Any of numerous plants of the genus Oxalis, having cloverlike compound leaves usually with three leaflets and five-petaled, variously colored flowers. Also called  sorrel,  wood sorrel. [Latin oxalis, wood sorrel, from Greek, from oxus, sour; see  ak- in the Appendix of Indo-European roots.]  (click for a larger image)oxalis windowbox wood sorrelOxalis rubra | 
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