Definition of "ten-thousandth" [ten-thousandth]

• One part in ten thousand equal parts (noun)

WordNet. Princeton University. 2010.

• "If it did, the shock wave would liquefy his organs and kill him in about one ten-thousandth of a second."
• "At 8 a.m. one recent day, Ruth had already begun her algebra lesson, while her sister, first-grader Sarah, was rounding off numbers to the ten-thousandth."
• "The average total excess radiation dose for a person living within 10 miles of the partially melted down Three Mile Island reactor core in 1979 was approximately 80 microsieverts, or less than one ten-thousandth of a potentially fatal dose."