sixteenth

six·teenth [sixteenth sixteenths] [ˌsɪksˈtiːnθ] ; [ˌsɪksˈtiːnθ] ordinal number, noun There are examples of how to use ordinal numbers at the entry for fifth.

Main entry: sixteenderived

Cambridge Advanced Learner's Dictionary

Cambridge Advanced Learner's Dictionary - 4th Edition

sixteenth / ˌsɪkˈstiːnθ / ordinal number

16th written as a word:

Their anniversary is on the sixteenth ( of June).

Collins COBUILD Advanced Learner’s English Dictionary

sixteenth

[sɪ̱ksti͟ːnθ]
♦♦
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

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