1.  citrous(a = adj.pert) - of or relating to plants of the genus Citrus; "a citrous disease"
Derived form noun citrus₂

2.  citrous(a = adj.pert) - of or relating to or producing fruit of the plants of the genus Citrus; "the citrus production of Florida"
Derived form noun citrus₁

1.  of or pertaining to a citrus tree; as, a citrous disease. [WordNet 1.5]

2.  of or pertaining to citrus. [WordNet 1.5]

citrous fruit