The long form of abbr is abbreviation.
Messieurs; abbr: MM.
There is no Abbr bushel. "Abbr." refers to "abbreviation".
the abbr. is PSY
Abbr is an abbreviation for the word abbreviation.An abbreviation (from Latin brevis, meaning short) is a shortened form of a word or phrase.Usually, but not always, it consists of a letter or group of letters taken from the word or phrase.For example, the word abbreviation can itself be represented by the abbreviation abbr., abbrv. or abbrev.
Yes, abbr is the abbreviation of the word abbreviation or abbreviate.