Ornith. [ad. F. tenuirostre, ad. mod.L. tenuirostris, f. tenui-s thin + rostrum beak, bill.] A member of the Tenuirostres, passerine or insessorial birds with slender bills; a slender-billed bird. So Tenuirostral a., of or pertaining to the Tenuirostres; also = next. Tenuirostrate a., slender-billed.
1837. Swainson, Nat. Hist. & Classif. Birds, III. iii. II. 13. This we think is the tenuirostral type of the circle.
1837. Penny Cycl., VIII. 146/2. According to Mr. Vigors, the Certhiadæ on one side lead the way to the Tenuirostral group.
1842. Brande, Dict. Sci., Tenuirosters.
1860. Mayne, Expos. Lex., Tenuirostrate.
1874. Wood, Nat. Hist., 305. The large group of birds which are termed Tenuirostral, or Slender-billed.
