root of lung n.
All the structures entering or leaving the lung at the hilum.
- Root of penis
root of penis n. The proximal attached part of the penis, including the two crura and the bulb.
- Root of the matter
The essential part or cause of something, as in We still don’t understand what happened; we must get to the root of the matter. This expression was first recorded in the Bible (Job 19:28).
- Root of tongue
root of tongue n. The rear attached portion of the tongue.
- Root of tooth
root of tooth n. The part of a tooth below the neck of the tooth, covered by cementum rather than enamel and attached by the periodontal ligament to the alveolar bone.