Strong's #712: ariston (pronounced ar'-is-ton)
apparently neuter of a superlative from the same as 730; the best meal (or breakfast; perhaps from eri ("early")), i.e. luncheon:--dinner.
Thayer's Greek Lexicon:
̓
ariston
1) the first food taken early in the morning before work, breakfast
2) later usage: dinner
Part of Speech: noun neuter
Relation: apparently neuter of a superlative from the same as G730
Usage:
This word is used 3 times:
Matthew 22:4: "Behold, I have prepared my dinner: my oxen and my fatlings"
Luke 11:38: "first washed before dinner."
Luke 14:12: "him, When thou makest a dinner or a supper, call not"