A handy reference features more than sixty thousand entries in a clear, readable type that are accompanied by user-friendly definitions, pronunciation keys, expressions that are native to American English, etymologies, widely used professional terms, andA handy reference features more than sixty thousand entries in a clear, readable type that are accompanied by user-friendly definitions, pronunciation keys, expressions that are native to American English, etymologies, widely used professional terms, and notes on usage. Original. notes on usage. Original.