[f. as prec. + -LET.] A little or tiny trout. Also attrib.
1829. Hood, Eugene Aram, i. There were some that ran and some that leapt, Like troutlets in a pool.
1879. Senior, Trav. & Trout Antipodes (1890), 121. By the 15th of June three thousand young salmon and fifty troutlet immigrants were swimming about, strong, contented, and merry.
1881. G. Allen, Vignettes fr. Nat., Mountain Tarn, 175. If ever a young Llyn Gwernant troutlet leaps the cascades.