Noun

(wikipedia ventricle) (en noun)

(anatomy, zoology) Any small cavity within a body; a hollow part or organ, especially:

# (anatomy) One of two lower chambers of the heart.

# (anatomy) One of four cavities in the brain.

# (archaic, anatomy, zoology) The stomach.

#* 1662 , , Book II, A Collection of Several Philosophical Writings of Dr. Henry More, p. 72:

[On birds] "Where omitting the more general Properties, of having two Ventricles , and picking up stones to conveigh them into their second Ventricle, the Gizzern, (which provision and instinct is a supply for the want of teeth;) "

# (archaic) The womb.

Noun

(en noun)

The male sex and endocrine gland, found in some types of animals, that produces sperm and male sex hormones, including the steroid testosterone.

My testicles hurt when I cross my legs.

* {{quote-book

, year=2000 , author=Margaret Atwood , title=The Blind Assassin , isbn= , page=372 , passage=Despite your jogging and the hairiness of your legs, the shoe of aging is beginning to pinch. Soon you'll regret all that sun-tanning. Your face will look like a testicle .}}