The term half-life is one we apply to radioactive materials to talk about how quickly they decay. The half-life is the time it takes for half of a given sample of the unstable substance (whatever it may be) to undergo radioacitve decay.
Harmony [har-mo-ny]â² as a girls' name (also used less regularly as boys' name Harmony) is pronounced HAR-mon-ee. It is of Latin origin, and the meaning of Harmony is unity, concord. A new age name. Mythology: Harmonia was the Greek goddess of order and daughter of Aphrodite.
Zerah /zer-ah/ [2 sylls.] as a name for boys is of Hebrew origin, and the name Zerah means glowing. Zerah is a version of Zerach (Hebrew).erah is a unique surname too for all people. (2000 U.S. Census). Displayed below is the baby name popularity of Zerah for boys. Zerah has yet to be listed in the Top 1000 thus far.