regular ordinal
limit ordinal which is not the limit of a set of smaller ordinals which set has order type less than it
en-US/ˈɹɛɡjəlɚ ˈɑɹdənəl/
en-GB/ˈɹɛɡjuːlə ˈɔːdɪnl/
limit ordinal which is not the limit of a set of smaller ordinals which set has order type less than it