zero age main sequence (ZAMS)
rešte-ye farist bâ senn-e sefr
Fr.: séquence principale d'âge zéro
The position on the → Hertzsprung-Russell diagram for newborn stars which have just started → hydrogen burning in their cores. The ZAMS forms the lower luminosity boundary of of the → main sequence strip. See also → terminal age main sequence (TAMS).