Don't let them be afraid that by joining the colours they will lose their identity and become absorbed in some invertebrate mass, or what is perhaps equally repugnant, be artificially redistributed into units which have no national cohesion or character.
"John Redmond's Last Years"
Stephen Gwynn
I don't like anything invertebrate.
"From the Housetops"
George Barr McCutcheon
A certain amount of opposition and enmity a man must be prepared for in this world, unless he live a very invertebrate life.
"Friendship"
Hugh Black