testiculate

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Having the shape of a testicle; ovoid.
• adjective Testicular.

from The Century Dictionary.

• Of the rounded or ovoid shape of a testicle.
• Having a pair of testicle-like formations.
• In botany: Shaped like a testicle.
• Having a pair of organs so shaped, as the tubers of Orchis mascula. Also testicular, testiculated.

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

• adjective Shaped like a testicle, ovate and solid.
• adjective Having two tubers resembling testicles in form, as some species of orchis.

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

• adjective Shaped like a testicle
• adjective Testicular