QUIDDITY
quiddity, haecceity
(noun) the essence that makes something the kind of thing it is and makes it different from any other
quibble, quiddity, cavil
(noun) an evasion of the point of an argument by raising irrelevant distinctions or objections
Source: WordNet® 3.1
Etymology
Noun
quiddity (plural quiddities)
(philosophy) The essence or inherent nature of a person or thing.
(legal) A trifle; a nicety or quibble.
An eccentricity; an odd feature.
Synonyms
• (essence): nature, quintessence, whatness; See also essence
Coordinate terms
• (essence): quality
Source: Wiktionary
Quid"di*ty, n.; pl. Quiddities. Etym: [LL. quidditas, fr. L. quid
what, neut. of quis who, akin to E. who: cf. F. quiddité.]
1. The essence, nature, or distinctive peculiarity, of a thing; that
which answers the question, Quid est or, What is it " The degree of
nullity and quiddity." Bacon.
The quiddity or characteristic difference of poetry as distinguished
from prose. De Quincey.
2. A trifling nicety; a cavil; a quibble.
We laugh at the quiddities of those writers now. Coleridge.
Source: Webster’s Unabridged Dictionary 1913 Edition