这个词是什么意思？
A T3 thyroid hormone normally synthesized and secreted by the thyroid gland in much smaller quantities than thyroxine (T4). Most T3 is derived from peripheral monodeiodination of T4 at the 5' position of the outer ring of the iodothyronine nucleus. The hormone finally delivered and used by the tissues is mainly T3.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D014284 · MeSH 2026。
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