The share of the eldest A term of the English law descriptive of the lotor share chosen by the eldest of coparceners when they make a voluntary partition.The first choice (primer election) belongs to the eldest. Co. Litt 100.Enitia pars semper prseferenda est propter privilegium oetatis. Co. Litt. 106. Thepart of the elder sister is always to be preferred on account of the privilege of age.