Body parts
The body parts of NetHack characters are used during the game in many ways. If polymorphed into a monster, you may lack a body part and be unable to perform some task. Such tasks include wearing armor, so if you polymorph into a handless monster, your gloves will fall off.
Messages for different body parts are changed as appropriate, for example if you don't have toes in a particular form, it may refer to your "pseudopod extremities" instead. These descriptions are grouped by a number of different overall body types.[1]
Body Parts
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Of notable monster body parts, the below examples are important:
Horns
Some monsters have horns, and hence cannot wear helmets. Unicorns and ki-rin have a single horn, while horned devils, minotaurs, balrogs, and Asmodeus have two[2].
Eyes
Floating eyes and the Cyclops have only one eye[3].
