the.com/parathyroid gland

means Four pea-sized glands tucked behind the thyroid that produce parathyroid hormone, which regulates how much calcium circulates in your blood and bones.

from Straightforward scientific Greek-building rather than folklore: 'para-' meaning 'beside' or 'alongside,' plus 'thyroid' (from Greek 'thyreoeides,' 'shield-shaped,' describing that gland's form). So the name just states anatomy plainly — the glands beside the thyroid. They were only identified as distinct organs with their own job in the late 19th century, having long been overlooked or mistaken for bits of thyroid tissue, which fits the essence's joke about credit-stealing.