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.
Geckos are not poisonous at all, neither for humans nor for their prey. Only very few lizard species have a venom and of those, only the Gila monster and the Komodo dragon are â¦ dangerous to humans (although with an attacking Komodo, venom is the least of your worries). + 53 others found this useful. Nola Sripermata.