octad

N กลุ่ม ของ แปด  อนุกรม ของ แปด  อะตอม ที่ มี วาเลน ซี เท่ากับ แปด 

OCTAD

Oc "tad, n. Etym: [Gr. (Chem. )

octad

oc tad |ˈäktad ˈɑktæd | ▶noun technical a group or set of eight. ORIGIN mid 19th cent.: via late Latin from Greek oktas, oktad-, from oktō ‘eight. ’

octad

octad |ˈɒktad | ▶noun technical a group or set of eight. ORIGIN mid 19th cent.: via late Latin from Greek oktas, oktad-, from oktō ‘eight ’.