D defs.my
Entry 1 sense Webster, 1913

Nonesuch

/nŭn'-sŭch'/ · None·such · IPA /nˈʌnsˈʌtʃ/
01 n. A person or thing of a sort that there is no other such; something extraordinary; a thing that has not its equal. It is given as a name to…
  1. 1.
    A person or thing of a sort that there is no other such; something extraordinary; a thing that has not its equal. It is given as a name to various objects, as to a choice variety of apple, a species of medic (Medicago lupulina), a variety of pottery clay, etc.