semiyearly

sem·i·year·ly

 (sĕm′ē-yîr′lē, sĕm′ī-)
adj.
Issued or occurring twice a year or once every half year.
n. pl. sem·i·year·lies
A semiyearly event or publication.
adv.
Every half year.

semiyearly

(ˌsɛmɪˈjɪəlɪ)
adj
another word for semiannual

sem•i•year•ly

(ˌsɛm iˈyɪər li, ˌsɛm aɪ-)

adj. adv.
2. twice a year; semiannually.
[1925–30]
usage: See bi-1.