Medical Definition of ARTHRODESIS. : the surgical immobilization of a joint so that the bones grow solidly together: artificial ankylosis. the surgical immobilization of a joint so that the bones grow solidly together. ADVERTISEMENT.
Trapdoor spiders are not particularly harmful to man however, like Tarantulas, the tiny hairs on the legs of some species leave tiny red marks where the toothed hairs on the spiders' feet have clung to the skin. Mouse spiders are also a type of Trapdoor spider with huge chelicerae and may measure up to 35mm in body length.
Dreaming of spider bites is usually not a good thing. Dreaming about poisonous spiders might potentially be even worse. Poison in dreams relates to poison in real life. This could be physical poison such as consuming too much alcohol, drugs, bad diet or anything else which might decrease your physical quality of life.