Which term describes the words that a person knows when seeing them in print?

The term that describes the words a person recognizes when they encounter them in print is reading vocabulary. This concept encompasses the words that individuals can read and understand in written texts, illustrating their comprehension and familiarity with written language. Reading vocabulary involves not just the ability to decode or pronounce words but also an understanding of their meanings in various contexts.

The other vocabulary terms have specific distinctions. Expressive vocabulary refers to the words a person can actively use in speaking or writing. Receptive vocabulary includes both spoken and written words that someone understands but may not use frequently in their own speech or writing. Writing vocabulary pertains specifically to the words that an individual chooses to use in their written communication. Each of these terms highlights different aspects of language use, but reading vocabulary specifically focuses on the understanding and recognition of words in print, making it the most suitable choice for this question.