While it's true that vegans are also vegetarians going strictly by dictionary definitions, without any other qualifier the term "vegetarian" is usually is taken

While it's true that vegans are also vegetarians going strictly by dictionary definitions, without any other qualifier the term "vegetarian" is usually is taken to mean lacto-ovo vegetarian, at least in some circles. Whether it's confusing or not or obvious or not, it was an extremely common term in the online vegetarian community I used to participate in around 15 years ago. Not trying to make a judgement on the term, just informing. "Hackers" have their own version - *nix.