| Term | Definition |
| anorchism | congenital absence of one or both testes |
| aspermia | unable to ejaculate sperm |
| balanitis | inflammation of the glands |
| benign prostatic hypertrophy (BPH) | hyperplasia of the prostate |
| carcinoma of the testes | malignant tumor of the testes |
| condyloma (genital warts) | warts caused by papilloma virus |
| cryptorchidism | undescended testes |
| epididymitis | inflammation of the epididymis |
| epispadias | malformation of the opening of the urethra on the dorsal surface |
| hydrocele | collection of fluid around the testicle causing swelling in the scrotum |
| hydrospadia | malformation of the opening of the urethra on the ventral surface |
| impotence | inability to achieve or maintain an erection |
| orchitis | inflammation of a testicle |
| paraphimosis | inability to pull forward the prepuce |
| Peyronie's disease | hardening of part of the penis |
| phimosis | inability to withdraw the prepuce due to narrowing of the opening |
| premature ejaculation | early ejaculation |
| priapism | prolonged painful erection |
| prostate cancer | slow growing malignancy of the prostate |
| prostatic hyperplasia | abnormal cell growth in the prostate |
| prostatitis | inflammation of the prostate |
| spermatocele | cyst containing sperm in the epididymis |
| testicular torsion | rotation of the testes producting ischemia |
| urethral stricture | narrowing of the urethra |
| urethritis | inflammation of the urethra |
| variocele | dilated veins near the testes |
