What does the symbol + mean when appended as a superfixed symbol to a word?

[Enoch]

In the Lust(ful) LXX Lexicon, what does a raised superscript + sign mean when appended to a head word?  For example, στέλλω appears as στέλλω+ w/ superscript plus sign).  I looked at the preliminary material & did not find an explanation of that symbol. (BTW, I can't find anyway to write superscript in this Accordance Forum word processor.)

[Brian W. Davidson]

It means the word is also used in the NT

[Enoch]

Thanks Brian.  I was checking the word which has a classical meaning in active as send; but neither NT nor so-called LXX has the active voice apparently; this was in consideration of the word apostolos.  Maybe pempo ran it off.