According to this report from the Nielsen Norman Group,
Our report on designing websites for senior citizens includes the following usability guideline:
"If using web or browser-related terms, consider defining them in place. Avoid using them if they are not necessary." [emphasis theirs, not mine]
[...]
Many users today understand standard web-related terms. But, in this study, many seniors were unsure about web terminology, such as page, homepage, website, or the web.
[...]
Some of the points and questions seniors made about web-related terms:
- “Is this a website or a web page? I don’t know the difference.”
- “I don’t know what ‘URL’ means. What is that?”
- “I don’t always know exactly what the word ‘web’ means.”
- “Is the homepage part of a website?”
- Another user couldn’t find an item on a particular page and said, “I don’t think I see it under this site.”
If these users were being confused by terms like "web page" and "URL," it's likely they'd be confused by a word like "field." So, if you're expecting a significant number of your users to be seniors or inexperienced with computers, this report suggests that it would be best to avoid that word.