Half-Life

The time it takes for a substance (drug, radioactive nuclide, or other) to lose half of its pharmacologic, physiologic, or radiologic activity.

Year introduced: 1974(1971)

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Tree Number(s): G01.910.405

MeSH Unique ID: D006207

Entry Terms:

• Half Life
• Half-Lifes
• Halflife
• Halflifes

Previous Indexing:

• specific radioisotope, substance, or cell
• Time (1966-1970)

All MeSH Categories
Phenomena and Processes Category
Physical Phenomena
Time
Half-Life