Diacritic or symbol question
What is the meaning of the dashed or dotted circle in a word?
Is the character shown in this pdf document?
If not, you could try and copy the word with that symbol in a word document and select a different font. It may just be a problem with a character in the font you (or your web browser) are using.
For example, my PC has a problem with Aleif Waslah and prints it as a dashed square.
the dashed circle is showing the absence of a consonant.
if you just type a diacritic in Word it puts a dotted circle to represent what would/should be a consonant.
the sukun سُكُون can be a small circle ْ or a V shape turned 90 degrees left depending on the font
In this image the laam and the meem have the sukun with the "v" turned font