Ordinal numbers
billionth
number
in the place or position counted as number one billion
eighth
number
in the place or position counted as number 8
eleventh
number
in the place or position counted as number 11
fifteenth
number
in the place or position counted as number 15
fifth
number
in the place or position counted as number 5
fiftieth
number
in the place or position counted as number 50
fortieth
number
in the place or position counted as number 40
fourteenth
number
in the place or position counted as number 14
fourth
number
in the place or position counted as number 4
hundredth
number
in the place or position counted as number 100
nineteenth
number
in the place or position counted as number 19
ninetieth
number
in the place or position counted as number 90
ninth
number
in the place or position counted as number nine
ordinal number
noun
a number such as ‘first’ or ‘second’ that shows what position something has in a series
second
number
in the place or position counted as number two
seventeenth
number
in the place or position counted as number 17
seventh
number
in the place or position counted as number 7
seventieth
number
in the place or position counted as number 70
sixteenth
number
in the place or position counted as number 16
sixth
number
in the place or position counted as number 6
sixtieth
number
in the place or position counted as number 60
tenth
number
in the place or position counted as number ten
tertiary
adjective
in the place or position counted as number three
third
in the place or position counted as number 3
thirteenth
number
in the place or position counted as number 13
thirtieth
number
in the place or position counted as number 30
thousandth
number
in the place or position counted as number 1,000
twelfth
number
in the place or position counted as number 12
twentieth
number
in the place or position counted as number 20
