
1) Spiders
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https://www.crosswordclues.com/clue/arachnology

Arachnology is the scientific study of spiders and related animals such as scorpions, pseudoscorpions, harvestmen, collectively called arachnids.. Those who study spiders and other arachnids are arachnologists. The word arachnology derives from Greek ἀράχνη, arachnē, `spider`; and -λογία, -logia. ==Arachnology as a science== Arachno.....
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http://en.wikipedia.org/wiki/Arachnology

study of spiders
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http://phrontistery.info/a.html

• (n.) The department of zoology which treats of spiders and other Arachnida.
Found on
http://thinkexist.com/dictionary/meaning/arachnology/

<study> The department of zoology which treats of spiders and other Arachnida. ... Origin: Gr. Spider. ... (04 Mar 1998) ...
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http://www.encyclo.co.uk/local/20973
Ar`ach·nol'o·gy noun [ Greek ... spider +
-logy .] The department of zoölogy which treats of spiders and other Arachnida.
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http://www.encyclo.co.uk/webster/A/113

arachnology Currently, about 30,000 species of spiders have been recognised, although it is certain that many more have yet to be discovered from all parts of the world. The spiders are known to occupy nearly every terrestrial habitat, from the peaks of the highest mountain ranges in the depths of the largest caves and holes, from damp marsh to dry...
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http://www.wordinfo.info/words/index/info/view_unit/172/2
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