Li
Part of speech: noun
Definition: A traditional Chinese unit of distance, now standardized to 500 metres. A traditional Chinese unit of weight, equal to one-thousandth of a liang, or fifty milligrams. A meaningful ceremony or ritual; etiquette, behaviour. An ancient Chinese cauldron having three hollow legs.
Fifty-one
Part of speech: numeral
Definition: The cardinal number immediately following fifty and preceding fifty-two.