MedicalTerminology DB

Meaning of thyroid: A gland located beneath the larynx (voice box) that makes thyroid hormone and calcitonin.

Definition of thyroid

A gland located beneath the larynx (voice box) that makes thyroid hormone and calcitonin. The thyroid helps regulate growth and metabolism. Also called thyroid gland.

How thyroid is built

thyr oid thyroid
  • thyr/o, thyroid/o Combining form · Greek thyroid gland
  • -oid Suffix · Greek resembling, like

A medical term is read from its ending backwards: the suffix first, then the prefix, then the root. See all 223 word parts.

Written and maintained by James Murray Last updated July 21, 2026 Educational reference, not medical advice. Read the limitations.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.