Exact

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As well as being able to specify that portions of a word are unknown by using the '*' character, you can be precise about the number of unknown letters if you wish. Just include one '?' character for each unknown letter.

So, for example, to find the word that starts with 'cal', then has one unknown letter, then an 'i', then some quantity of unknown letters, then a 't', an unknown letter, and finally 'on', search for 'cal?i*t?on'.

This produces a single match, the entry for calcification:

[enlarge]

This can be useful when you are uncertain about a spelling or trying to solve a crossword.

Versatile

step 11 of 37

User-friendly