ductulen.

1883 M. Foster & F. M. Balfour Elem. Embryol. I. vi. 18 As the ductules grow longer and become branched, vascular processes grow in between them.

1924 H. E. Jordan Text-bk. Histol. (ed. 3) xv. 502 The ductuli aberrantes are blind tubules... The superior ductule opens into the epididymis..; the inferior opens at the globus minor.

1939 E. R. A. Cooper Human Histol. xii. 203 Interlobular ducts continue into intralobular ones, from which terminal ductules communicate with collections of secretory cells known as alveoli.

1951 H. A. Cates Primary Anat. (ed. 2) viii. 222/2 Each efferent ductule, finer than the lead of a pencil, is highly coiled and, when unraveled, about eight inches long.

1967 G. M. Wyburn et al. Conc. Anat. i. 15 Twelve to sixteen small ducts, the efferent ductules, connect the testis to the head of the epidi[d]ymis.