Definition of birthstone in English:

birthstone

Syllabification: birth·stone
Pronunciation: /ˈbərTHˌstōn
 
/

noun

  • A gemstone popularly associated with the month or astrological sign of one’s birth.
    More example sentences
    • Gems and birthstones are becoming more popular, as are styles such as solitaire diamonds, cluster rings and diamond set rings with small stones or gems set on either side.
    • Anyway, some people go by month when determining birthstones, others go by the zodiac.
    • Which is the birthstone for the month of September?

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Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
noun
(in science fiction) navigation in outer space