The term "invertebrated" is a rare and archaic adjective that describes a living organism that lacks a backbone or a vertebral column. In other words, it refers to animals or creatures that do not possess a spinal column, including those belonging to the animal kingdom's major subdivision, Invertebrata. This diverse group encompasses a vast array of species, ranging from insects, spiders, and worms to mollusks, crustaceans, and jellyfish.
Invertebrated organisms are characterized by their structural and physiological differences from their vertebrate counterparts. Since they lack a backbone, these creatures often possess a flexible and soft body that allows for greater adaptability and maneuverability. Their internal framework may instead be comprised of exoskeletons, hydrostatic support systems, or characteristic tissue arrangements.
The term "invertebrated" can also be used metaphorically to describe non-living or abstract entities lacking strength, resilience, or substance. In this context, it refers to characteristics or qualities that are feeble, weak, or inadequate. For example, one might describe a flimsy argument as "invertebrated" to criticize its lack of a solid foundation or supporting evidence.
Overall, the term "invertebrated" was predominantly used in earlier scientific and literary contexts and has become less widely employed in contemporary language. Its primary significance lies in referring to organisms without a backbone and symbolically highlighting weaknesses or deficiencies.
