trŏchĭlus, i, m., = tro/xilos. I.A very small bird, perh. the golden-crested wren, trochil, Plin. 10, 74, 95, 203; 8, 25, 37, 90.—II. In architecture, a semicircular hollow running round the base of a column, a casement, scotia, trochil, Vitr. 3, 3 med.