Definition of -blast in English:

-blast

combining form

Biology
1Denoting an embryonic cell: erythroblast Compare with -cyte.
1.1Denoting a germ layer of an embryo: epiblast

Origin

from Greek blastos 'germ, sprout'.

Definition of -blast in:

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Word of the day vituperate
Pronunciation: vəˈt(y)o͞opəˌrāt
verb
blame or insult (someone) in strong language...