Definition of semidouble in English:

semidouble

adjective

  • (of a flower) intermediate between single and double in having only the outer stamens converted to petals.

    • ‘Plants tend to be hardy, low growing and produce single or semi-double flowers.’
    • ‘The huge showy double and semi-double flowers are real eye-catchers - many of them grow to more than three inches across.’
    • ‘Depending on their variety, they can have double or semi-double blossoms, with petals of darker shades at their edges.’
    • ‘The Hawaiian hybrid forms of Hibiscus rosa-sinensis have been bred to include a wonderful range of pinks with single, semi-double and fully double flowers, sometimes with two or three shades in each flower.’
    • ‘The balloon-like buds may open into semi-double flowers having ten petals instead of the regulation five which are indeed lovely.’

Pronunciation:

semidouble

/ˌsemēˈdəbəl//ˌsemˌī-/