sixteenth

[sɪ̱ksti͟ːnθ]
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sixteenths
1) ORD The sixteenth item in a series is the one that you count as number sixteen.
  ...the sixteenth century AD.
2) FRACTION A sixteenth is one of sixteen equal parts of something.
  ...a sixteenth of a second.
  ...fifteen sixteenths of an inch.

Merriam-Webster's Advanced Learner's Dictionary

sixteen

six·teen /ˌsɪkˈstiːn/ noun, pl -teens [count] : the number 16
- sixteen adj
• sixteen years
- sixteen pronoun
• Sixteen (of them) will be coming tonight.
- six·teenth /ˌsɪkˈstiːnɵ/ noun, pl -teenths [count]
• I'll see you on the sixteenth of April.
• The bill is due on the sixteenth (of the month).
• one sixteenth of the total
- sixteenth adj
• The paintings were made in the sixteenth century.
• He finished in sixteenth place.
- sixteenth adv
• She finished sixteenth in the race.
• the nation's sixteenth largest city