• (a.) Having twice as many stamens as petals, as the geranium.
Dip`lo·stem'o·nous adjective [ Greek ... double + ... the warp, a thread.] (Botany) Having twice as many stamens as petals, as the geranium. R. Brown. 
having two whorls of stamens, with the outer whorl opposite the sepals and the inner whorl opposite the petals.