BESTIALITY
bestiality, zooerastia, zooerasty, sodomy
(noun) sexual activity between a person and an animal
bestiality
(noun) the stupid brutal quality of a beast
Source: WordNet® 3.1
Etymology
Noun
bestiality (countable and uncountable, plural bestialities)
(archaic) A status of lower animal.
(archaic) An animal-like instinct or behaviour.
(archaic) A mark, trait, or emblem of a beast.
Sexual activity between a human and another animal species.
Bestial nature, savagery, inhumanity, like (or akin to) an animal's.
(dated) Any abstract entity similar to a beast.
Source: Wiktionary
Bes*tial"i*ty, n. Etym: [F. bestialité.]
1. The state or quality of being bestial.
2. Unnatural connection with a beast.
Source: Webster’s Unabridged Dictionary 1913 Edition