1) zâymân; 2) zâdmân, zâd; 3) zâyeš
Fr.: 1) acouchement; 2;3 ) naissance
1) The act or process of bearing or bringing forth offspring.
M.E. byrthe; O.E. gebyrd; cf. O.H.G. giburt, Ger. geburt; PIE *bhrto, from *bher- "to bear."
1) Zâymân, from zây present stem of zâyidan, zâdan "to give birth"
Av. zan- "to bear, give birth to a child, be born,"
infinitive zazāite, zāta- "born;"
cf. Skt. janati "begets, bears;"
Gk. gignesthai "to become, happen;" L. gignere
"to beget," gnasci "to be born;" PIE base *gen-
"to give birth, beget") + -mân a suffix forming verbal nouns,
birth binary population (BBP)
porineš-e dorinhâ hengâm-e zâdmân
Fr.: population binaire à la naissance
In star formation models, the population of binary components formed via random pairing of stars distributed according to the → canonical IMF.
→ birth; → binary; → population.
Fr.: ligne de naissance
The path in the → H-R diagram that continuously → accreting stars follow. Stars on the birthline are difficult to observe, because they are hidden by the → accretion disk and a dense → cocoon of → interstellar matter. The star becomes visible once a sufficient amount of the surrounding matter has been dispersed. It follows that the young starsare observed generally between the birthline and the → zero-age main sequence (ZAMS). Before hydrogen ignition, gravitational contraction and deuterium burning are the main energy sources for the star. The localization of the birthline depends on the deuterium → accretion rate. First introduced by R. Behrend & A. Maeder, 2001 (A&A 373, 190).