Lab
T3 medical abbreviation
T3 means "triiodothyronine".
Each meaning matched at least two public references (3 in all for T3), checked October 23, 2026. The table lists them.
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What T3 means
| Meaning | Latin origin | Where used | Checked against |
|---|---|---|---|
| triiodothyronine | None | Lab orders, Charting |
Example
Sample lab order: "T3."
A made-up line that shows the abbreviation in place. It is not about any patient and is not an instruction.
Related abbreviations
Elsewhere on Rivvi
Questions
What does T3 mean in medical terms?
T3 means "triiodothyronine".
Where is T3 used?
T3 shows up in lab orders and charting. Its category here is lab.
Is T3 on the Joint Commission Do Not Use list?
No. T3 is not on the Joint Commission Do Not Use list or the ISMP error-prone list as checked on October 23, 2026.