Testicular (adjective)

1. Of or relating to the testicles.
2. Having testicles as a distinctive feature.

Origin:

Early 17th century: from late latin testiculāris, from testiculus 'testicle', from testis 'testicle'. the original sense was 'of or pertaining to a testicle', later used specifically in anatomy and zoology.

Examples:

1. The patient was diagnosed with testicular cancer.
2. The testicular pain was so severe that he had to go to the emergency room.
3. The testicular size and shape can indicate certain health issues.
4. Many species of reptiles have visible testicular sacs.
5. The testicular function is vital for male fertility.