es•ne•cy(es′nə sē),USA pronunciationn.[Obs.](in English law)
Lawthe right of the oldest member of a coparcenary to have first choice of share upon division of the inheritance.
Medieval Latin aesnecia, Latinization of Old French ainsneece, ainsnesse position of an older brother or sister, derivative of ainsne elder (compare Latin antenātus (one) born before another)