According to the textbooks I use as Assistant Professor of Graphic design there are some incorrect/incomplete typographic definitions listed above.

A font is a collection of all of the individual characters comprising a typeface (including uppercase and lowercase letters, numbers, punctuation, special characters, etc). Traditionally, one point size of a given font would be considered a different font than would another point size, because it would have required a completely different set of letterpress for each size. However, with digital fonts, size is more a computational variable than a requirement for having of a different font file, so a change in size is not necessarily considered to be a change in font nowadays.

A typestyle is a variation of a font design within the same font family (i.e. Times Bold, Times Italic, etc)

The definition of a typeface above is adequate, however a more specific definition might refer to the design of the individual letterforms of a particular font giving that font/font family it’s consistent, unique, and identifiable characteristics

A type/font family is a a number of fonts grouped together and relating by design. Each font within the same family relates to the other fonts of the same family but has variation(s) in type style (i.e. bold, italic, condensed, heavy, etc.)

~Douglas
5 Lessons Learned By a Young Webmaster

Glad you did – I found your post about fonts really interesting – have to say it’s something I’d never really thought much about before.

I’m in two minds about text size on blogs – too large and the page looks out of balance yet too small and it’s hard to read. With some fonts I just can’t seem to get it right – trial & error stuff I guess.