invertebrate

1. N-COUNT An invertebrate is a creature that does not have a spine such as an insect, a worm, or an octopus. 無(wú)脊椎動(dòng)物[技術(shù)]

2. ADJ Invertebrate is also an adjective. 無(wú)脊椎的

...invertebrate creatures. ...無(wú)脊椎動(dòng)物。