For Invertebrate we have terms and definitions in 5 topics. The topics are Biodiversity, Ecology, Oceanography, Physical Geography and Speleological.

Invertebrate (Biodiversity)

An organism that does not have a backbone

Invertebrate (Ecology)

An animal without a backbone. Invertebrates include insects, arachnids (spiders & ticks), gastropods (snails & slugs), crustaceans (crayfish & isopods), centipedes, worms, and others.

Invertebrate (Oceanography)

Any animal without a backbone.

Invertebrate (Physical Geography)

Animal that does not have a backbone. Also see vertebrate.

Invertebrate (Speleological)

An animal without a backbone. eg Annelid (worm), Mollusc (snail) & Arthropods. The main life forms found in caves.
Fauna.

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