a. Bot. [f. mod.L. aurantiāceæ, f. aurantium, latinized adaptation of ORANGE: see -ACEOUS.] Of or belonging to the N.O. Aurantiaceæ, which includes the trees that bear oranges, lemons, and similar fruits.
1837. Penny Cycl., VII. 214/1. Citrus, a genus of aurantiaceous plants.
1873. Watts, Fownes’ Chem., 778. The coniferous and aurantiaceous orders.
