7 the operating mechanism, esp. in a piano, gun, watch, etc. 8 (of a guitar) the distance between the strings and the fingerboard. 9 (of keyboard instruments) the sensitivity of the keys to touch. 10 the force applied to a body. the reaction is equal and opposite to the action.
Quick Answer. The Hawaiian happy face spider, Theridion grallator, is not poisonous. While the arachnid belongs to the same family as the feared black widow, it lacks the toxic venom. The species is named for the array of color patterns across the abdomen, some of which resemble a smiling face. Continue Reading.
Most spiders don't bite humans and only do so if they're provoked. When spiders bite, the vast majority of bites only cause a mild reaction in people, such as minor swelling, inflammation, or itching. However, there are a few poisonous spiders in North America that can be dangerous.