Spiders

[Evil Eye]

bug (plural bugs)

1. An insect of the order Hemiptera (the "true bugs").
2. (colloquial) Any insect, arachnid, or other terrestrial arthropod that is a pest.

http://en.wiktionary.org/wiki/bug
Now, a spider would be #2 arachnid.

arachnid (plural arachnids)

1. Any of the eight-legged creatures, including spiders and scorpions, of the class Arachnida

http://en.wiktionary.org/wiki/arachnid
Which brings us to spider.

spider (plural spiders)

1. Any of various eight-legged, predatory arthropods, of the order Araneae, most of which spin webs to catch prey.

http://en.wiktionary.org/wiki/spider
Which brings us to arthropod.

arthropod (plural arthropods or arthropodae)

1. An invertebrate animal of the phylum Arthropoda, characterized by a chitinous exoskeleton and multiple jointed appendages.

http://en.wiktionary.org/wiki/arthropod
And finally to animal.

animal (plural animals)

1. In scientific usage, a multicellular organism that is usually mobile, whose cells are not encased in a rigid cell wall (distinguishing it from plants and fungi) and which derives energy solely from the consumption of other organisms (distinguishing it from plants).

http://en.wiktionary.org/wiki/animal

 

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