Hfr

High frequency, in the sense of bacterial conjugation.
Found on http://www.encyclo.co.uk/visitor-contributions.php

HFR

High falls risk
Found on http://www.encyclo.co.uk/visitor-contributions.php

Hfr

The result of the discussion was History Merge to Church of St. John the Evangelist (Hunter, New York). — xaosflux Talk 14:32, 6 July 2014 (UTC) ====User:Vanden38/St. John the Evangelist Episcopal Church (Tannersville, NY)==== ...
Found on http://en.wikipedia.org/wiki/Hfr
No exact match found