late 13c., "recollection (of someone or something); remembrance, awareness or consciousness (of someone or something)," also "fame, renown, reputation;" from Anglo-French memorie (Old French memoire, 11c., "mind, memory, remembrance; memorial, record") and directly from Latin memoria "memory, remembrance, faculty of remembering," abstract noun from memor "mindful, remembering," from PIE root *(s)mer- (1) "to remember."

Sense of "commemoration" (of someone or something) is from c. 1300. Meaning "faculty of remembering; the mental capacity of retaining unconscious traces of conscious impressions or states, and of recalling these to consciousness in relation to the past," is late 14c. in English. Meaning "length of time included in the consciousness or observation of an individual" is from 1520s. 

I am grown old and my memory is not as active as it used to be. When I was younger I could remember anything, whether it had happened or not; but my faculties are decaying now and soon I shall be so I cannot remember any but the things that never happened. It is sad to go to pieces like this, but we all have to do it. ["Mark Twain," "Autobiography"]

Meaning "that which is remembered; anything fixed in or recalled to the mind" is by 1817, though the correctness of this use was disputed in 19c. The word was extended, with more or less of figurativeness, in 19c. to analogous physical processes. Computer sense, "device which stores information," is from 1946. Related: Memories.

"of the nature of, employed in, or pertaining to reproduction," 1753; see reproduce + -ive. Related: Reproductively; reproductiveness. Reproductive organ is by 1816; reproductive system "organs involved in producing offspring" by 1822. In U.S., reproductive rights is attested from 1970.

"transfer of pollen from the male reproductive organ of one plant to the female reproductive organ of another plant," 1880, from cross- + pollination.

"reproductive, budding or sprouting into new similar forms," 1868, from proliferate + -ive.

"pertaining to memory," 1898, from Greek mnesikos "of memory," from mnesis "memory" (see mnemonic).

1753, "aiding the memory, intended to assist the memory;" 1825, "pertaining to the memory," a back-formation from mnemonics, or from a Latinized form of Greek mnēmonikos "of or pertaining to memory," from mnēmōn (genitive mnēmonos) "remembering, mindful," from mnēmē "memory, a remembrance, record, an epitaph; memory as a mental faculty," from base of mnasthai "remember," from PIE root *men- (1) "to think." The noun meaning "mnemonic device" is from 1858. Related: Mnemonical (1660s).

late 14c., "reproductive, pertaining to propagation," from generate + -ive. Use in linguistics is attested by 1959. Related: Generativity.

"morbidly persistent erection of the penis," 1620s, from Late Latin priapismus, from Greek priapismos (also "lewdness"), from priapizein "to be lewd," from Priapos, the name of the god of male reproductive power. See priapic + -ism.

"pertaining to memory," 1914, from Greek mnestis "remembrance," related to mnesis "memory" (see mnemonic) + -ic.