aurantiaceous

from The Century Dictionary.

• Of or belonging to the Aurantiaceæ.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Pertaining to, or resembling, the Aurantiaceæ, an order of plants (formerly considered natural), of which the orange is the type.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Of or relating to oranges or orange trees.
• adjective archaic Relating to the former family Aurantiaceae.