tourelle

plural tourelles

1. A turret.

   At each corner of the court rises a quaint and crusty little tourelle from which the beseiged could keep up a raking fire along the thick walls.

   1974, Lawrence Durrell, Monsieur, Faber & Faber, published 1992, page 45

   1 more example

   Large, stately, and dark was its [the château's] outline against the dusky night-sky; there were pepper-boxes and tourelles and what-not fantastically going up into the dim starlight.

   1861, Elizabeth Gaskell, The Grey Woman