No. Slugs are gastropod molluscs and have none of the defining traits of arachnids.
They are 'arachnids'. They are not spiders. Spiders are arachnids too, but spiders belong to a distinct family of arachnids, Aranaea.
Slugs are, for the most part, harmless to humans. I'm frankly not sure what the second half of your question is supposed to mean. About the only way a slug could hurt you is if you ate it; and it would likely be parasites in the slug, rather than the slug itself, that caused the problem.
An ant would not eat a slug because it is too big for an ant to eat.
Arachnid, or 8 legged animal, scorpions are arachnids too.
Yes, unless there is a mutation such as too many or too little chromosomes, the ninth leg would be like a human having a third. Having eight legs is what qualifies spiders as arachnids.
A short piece of solid bar steel used when jointing 2 pieces of tubing. The tubes are slid over the slug, to reinforce the joint and it adds additional metal to weld too.
Excessive freon may cause the compressor to"slug" (Seize)
The cast of Your Turtleneck Is Way Too Tight - 2006 includes: Sean Daley as Slug
Since the shells of mollusks are composed of calcium carbonate (limestone), the likelihood of the surrounding rocks being limestone too would be very high, due to the shells of dead mollusks.
The Latin word for "slug" is limax (-acis, m. or f.).There are many latinesque scientific names for particular species of slug, but these are too numerous to list here.The answer "gliemzies" that can be found here and there on the Internet is incorrect, and appears to be purely an artifact of an earlier WikiAnswers answer. In fact this is a Latvian word, not a Latin one.
Arachnid, or 8 legged animal, scorpions are arachnids too.
Neither, they are gastropods meaning they are related closer to mussels and squids than they are to insects.