mor·tal·i·ty 
(môr-tălĭ-tē)
(môr-tălĭ-tē)n. pl. mor·tal·i·ties
1. The quality or condition of being mortal.
2. Mortals considered as a group; the human race.
3. Death, especially of large numbers; heavy loss of life: the mortality wrought by an epidemic.
4. Death rate.
5. The rate of failure or loss: the high mortality among family-run farms.
- trigger-happy
- triggerman
- trigly
- triglyceride
- triglyph
- triglyphic
- trigness
- trigon
- trigonal
- trigonometric
- trigonometrical
- trigonometrically
- trigonometric function
- trigonometry
- trigram
- trigrammatic
- trigrammatically
- trigraph
- trigraphic
- trigraphically
- trihalomethane
- trihedral
- trihedron
- trihybrid
- triiodothyronine