The print sample shows that you need information on p. 187 of <i>World Braille Usage. </i>What looks like an apostrophe before the A in the Grrek word you are asking about could either be an elision or a breathing mark. There's no indication that is an elision. Elision is defined as "the omission of one or more sounds (such as a vowel, consonant, or a whole syllable) in a word or phrase.
That apostrophe is actually a breathing mark. You have both the spiritus asper (rough breathing dots 125) and the spiritus lenis (smooth breathing mark dots 356) in your print sample. They are mirror images of each other in print, placed above some of the lower case Greek letters in your sample. You'll also see them above the letter, prior to the accent, in some of the Greek words also.
I am unable to Braille this for you because of my current location, but WBU gives you the information you need. (WBU is found on the Perkins.org site). The breathing marks precede the accent signs.