The term LIFE REGIONAL is composed of two words, 'LIFE' and 'REGIONAL'. The first word, 'LIFE', is a noun that refers to the existence of all living things. The second word, 'REGIONAL', is an adjective that describes something that is related to a particular region or area. The crossword solution for this term is BIOTA, which is a noun that refers to all the living organisms in a particular region or area. Therefore, the term LIFE REGIONAL can be defined as the collective living organisms in a particular region or area.