Strong's #2256: hemiorion (pronounced hay-mee-o'-ree-on)
from the base of 2255 and 5610; a half-hour:--half an hour.
Thayer's Greek Lexicon:
̔́
hēmiōrion
1) half an hour
Part of Speech: noun neuter
Relation: from the base of G2255 and G5610
Usage:
This word is used 1 times:
Revelation 8:1: "in heaven about the space of half an hour."