Arch. [It. tondino, dim. f. tondo round: see next. In Fr. tondin.] (See quot. 1823.)
1704. J. Harris, Lex. Techn., I. Tondino, a Term in Architecture. See Astragal.
1823. P. Nicholson, Pract. Build., 595. Tondino, a round moulding resembling a ring.
