/parəˈθʌɪrɔɪd/
Noun
1. A parathyroid hormone. (wiktionary.org)
2. Endocrine gland occurring in all vertebrate species from amphibia upward, usually located close to and behind the thyroid gland. Humans usually have four parathyroid glands, each composed of closely packed epithelial cells separated by thin fibrous bands and some fat cells. The parathyroid glands secrete parathormone (also called parathyroid hormone), which functions to maintain normal serum calcium and phosphate concentrations.
3. A gland next to the thyroid which secretes a hormone ( parathyroid hormone ) that regulates calcium levels in a person’s body. (Google Dictionary)
4. A sterile preparation of the water soluble principle of the parathyroid glands, administered parenterally as an antihypocalcaemic, especially in the treatment of acute hypoparathyroidism with tetany. (biology-online.org)
Adjective
1. Situated near the thyroid gland. (wiktionary.org)
2. Pertaining to the parathyroid glands or their extracts. (wiktionary.org)