• Vocal Cords Definition: a pair of folds at the upper end of the throat whose edges movequickly backwards and forwards and produce sound when air from the lungs moves over them.

(http://dictionary.cambridge.org/dictionary/english/vocal-cords)

• Vocal Cords Definition: One of two small bands of muscle within the larynx. These muscles vibrate to produce the voice. The vocal cords form a "V" inside the larynx, a 2-inch-long, tube-shaped organ in the neck: We use the larynx when we breathe, talk, or swallow. Its outer wall of cartilage forms the area of the front of the neck referred to as the "Adams apple." Each time we inhale (breathe in), air goes into our nose or mouth, then through the larynx, down the trachea, and into our lungs. When we exhale (breathe out), the air goes the other way. When we breathe, the vocal cords relax and air moves through the space between them without making a sound. When we talk, the vocal cords tighten up and move closer together. Air from the lungs is forced between them and makes them vibrate, producing the sound of our voice. The tongue, lips, and teeth form this sound into words. The larynx is also sometimes called the voice box.

(http://www.medicinenet.com/script/main/art.asp?articlekey=6003)

• Vocal Cords Definition: Folds of membranous tissue which project inwards from the sides of the larynx to form a slit across the glottis in the throat, and whose edges vibrate in the airstream to produce the voice.

(https://en.oxforddictionaries.com/definition/vocal_cords)