urtical

from The Century Dictionary.

• In botany, of or belonging to the nettles; typified by the genus Urtica: as, the urtical alliance. Lindley.
• Stinging; capable of urticating; serving for urtication, as the trichocysts of infusorians. See trichocyst.

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

• adjective Resembling nettles; -- said of several natural orders allied to urticaceous plants.

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

• adjective Resembling nettles.