Tyn·dall 
(tĭndl), John 1820-1893.
(tĭndl), John 1820-1893. Irish-born British physicist and lecturer known for his work on atmospheric gases and the scattering of light by small particles.
- attainable
- attainder
- attainment
- attaint
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- Attar
- attempt
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- attempter
- attend
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- attendant
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- attendee
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- attentional
- attention deficit disorder
- attention deficit hyperactivity disorder
- attention span
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- attenuate