47 Down is one

• Short for short?
• Truncated wd. in a text
• Shortened wd
• NASA, e.g
• This ans., e.g.
• Etc., for one
• Oz., e.g
• This ans., e.g
• NASA, e.g.

Wiktionary Word definitions in Wiktionary
n. (alternative spelling of abbr. dot= English).