I. ˈȯrd( ə )nəl, ˈȯ(ə)d- noun
( -s )
Etymology: Middle English, from Medieval Latin ordinale, from Late Latin, neuter of ordinalis, adjective
1.
a. usually capitalized
a. : a book containing directions for Roman Catholic services every day in the year
b. : a collection of forms to be used in the Anglican Communion in the consecration of bishops and the ordination of priests and deacons
2.
[Late Latin ordinalis, from ordinalis, adjective]
: ordinal number
3. : the divisor in a fraction as spoken or written out (as hundredth in one hundredth or hundredths in three hundredths
II. adjective
Etymology: Late Latin ordinalis, from ordin-, ordo order + -alis -al — more at order
1. : being of a specified order or rank (as sixth) in a numerable series
2. : of or relating to an order
family and ordinal names … of fishes are badly jumbled in the text — New York Herald Tribune Book Review