.45


Meaning of .45 in English

.45 /ˌfɔːti ˈfaɪv $ ˌfɔːrti-/ BrE AmE noun [countable]

a pistol (=small gun) that takes ↑ bullet s which are .45 ↑ inch es in ↑ diameter

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.