(Biology) Having no spines.
Any aquatic animal with a shell, esp. an edible animal such as the clam or lobster
Lacking in vigour or expression.
(Cytology) Any of the diverse group of eukaryotes, of the phylum Protozoa, that are primarily unicellular, existing singly or aggregating into colonies, are usually nonphotosynthetic, and are often classified further into phyla according to their capacity for and means of motility, as by pseudopods, flagella, or cilia.
Any of numerous invertebrate animals of the phylum Arthopoda, characterized by an exoskeleton made of chitin and a segmented body with pairs of jointed appendages. Arthropods share many features with annelids and may have evolved from them in the Precambrian Era. Arthropods include the insects, crustaceans, arachnids, myriapods, and extinct trilobites, and are the largest phylum in the animal kingdom.
Unsure of how to act or proceed; undecided.
The definition of cowardly is something characterized by a lack of courage.
The definition of a crab is a shelled marine animal that has pincers and a flat abdomen, or the meat of the shelled marine animal.
The definition of a worm is an animal that is slender, soft and often segmented, or an insect larva, or a nasty person, or an unauthorized computer program.
Not clearly defined; indefinite:
The definition of a clam is an animal that lives in shallow water with a hard shell and no backbone, or is slang for a U.S. dollar.
Any of several similar crustaceans, such as a spiny lobster.
Find another word for invertebrate. In this page you can discover 33 synonyms, antonyms, idiomatic expressions, and related words for invertebrate, like: spineless, spineless animal, protozoic, , vertebrate, shellfish, molluscan, nonskeletal creature, weak, protozoan and arthropod.