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.
David /dav-id/ [2 sylls.] as a boys' name is pronounced DAY-vid. It is of Hebrew origin, and the meaning of David is beloved. Biblical: one of the most remarkable personalities in the Scriptures.David was a shepherd, musician, poet, soldier, statesman, prophet, and king.He wrote about half of the Psalms and very likely composed music for them as well.avid /dav-id/ [2 sylls.] as a boys' name is pronounced DAY-vid. It is of Hebrew origin, and the meaning of David is beloved. Biblical: one of the most remarkable personalities in the Scriptures.