noun
or hec·ce·i·ty -əd.ē
( -es )
Etymology: Medieval Latin haecceitas, from Latin haec, haecce, feminine of hic, hicce this + -itas -ity
: the status of being an individual or a particular nature : individuality , specificity , thisness ; specifically : what makes something to be an ultimate reality different from any other — compare quiddity 2