a. Obs. rare1. [f. THIN a.: see -MOST.] Thinnest.

1

1644.  Nye, Gunnery (1670), 83. If this Peece were fortified … onely so much, as the thinmost part of the metall is.

2

1884.  R. F. Burton, tr. Camoens’ Lyricks, Sonn. xliii. 10.

        The tristful dying of my Love-in-grief,
  Already thinnèd to the thinmost thread.

3