Although most crocodiles eat about 50 meals a year, they can survive a whole year, and sometimes even two or three years, without eating anything.
Vocabulary is commonly defined as all the words known and used by a particular person. Knowing a word, however, is not as simple as merely being able to recognize or use it. There are several aspects of word knowledge that are used to measure word knowledge.
Finally, for completeness, a vocabulary is a list of words that an individual knows or uses regularly. Vocabulary is different from lexicon because vocabulary is about what an individual or group of people know, whereas lexicon is about the language itself.