athyrotic

a·thy·rot·ic

(ā'thī-rot'ik), Relating to athyroidism.

athyrotic

adjective
(1) Hypothyroid. 
(2) Referring to thyroid agenesis, thyroid aplasia.

a·thy·rot·ic

, athyreoytic (ā'thī-rot'ik, -thī-rē-ot'ik) Relating to athyroidism.