from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun zoology Any member of the Theraphosidae.
Sorry, no etymologies found.
All this from the prophets of theraphosid prognostication, who SWORE that the spider must be a male because its "such and such was so and so".
When threatened (big theraphosid spiders are their most likely predators), they tuck in their limbs and fold their heads down to form a ball-like shape.