What does the word invertebrate mean?

Usage examples for invertebrate

  1. Criticism she made in plenty, being the daughter of a voluble mother; and she never gave up hope of stiffening the spine of the invertebrate Hermie. – Gigolo by Edna Ferber
  2. One fellow, who reeled through the car in a molluscous invertebrate condition, stopped by my seat to tell me he was my friend for life. – Seeds of Pine by Janey Canuck
  3. But in that room, in that presence, I was invertebrate. – The Beetle A Mystery by Richard Marsh