"evolution or birth of a species," 1870, coined in German by Haeckel, from phylo- + -genesis "birth, origin, creation." Related: Phylogenetic.

late 15c., "birth" (Caxton), a sense now obsolete, from natal + -ity. Sense of "birth-rate, ratio of the number of births in a given period to the total of the population" is from 1884, from French natalité, used in the same sense.

late 14c., "of or pertaining to birthdays;" mid-15c., "of or pertaining to one's birth," from Latin natalis "pertaining to birth or origin," from natus, past participle of nasci "to be born" (Old Latin gnasci), from PIE root *gene- "give birth, beget." It is the learned form of Noel, which was the French vernacular word.

"birth, origin," late 15c. (Caxton), from French naissance "birth, parentage, place of origin" (12c.), present participle of naître, from Gallo-Roman *nascere, from Latin nasci "be born" (see genus).

"asexual reproduction, reproduction by fission or gemmation," 1869, from Greek monos "single, alone" (see mono-) + -gonia "a begetting," from gonos "birth" (from PIE root *gene- "give birth, beget"). 

"subsequent to birth," 1831, from post- + natal.

mid-15c., "of low birth;" 1590s as "not honorable, of low character;" from French ignoble (14c.), from Latin ignobilis "unknown, undistinguished, obscure; of base birth, not noble," from assimilated form of in- "not, opposite of" (see in- (1)) + gnobilis "well-known, famous, renowned, of superior birth," from PIE root *gno- "to know." Related: Ignobly; ignobility.

"bringing forth many young at a birth," 1640s, from Modern Latin multiparus "giving or having given birth to many," from multi- "many" + stem of parire "to bring forth" (from PIE root *pere- (1) "to produce, procure"). Related: Multiparity.