s a Latin word, signifying a little net Reticulum or casting net. It was applied by the Romans to a parti- cular mode of constructing their buildings. In the city of Salino may still be seen remains of some walls, evidently of Roman origin, from the reticulum. This structure con- sists of small pieces of baked earth, cut lozenge-wise, and disposed with great regularity on the angles, so as to ex- hibit to the eye the appearance of cut diamonds; and it was called reticulum, from its resemblance to fishing-nets. The Romans always concealed it under a regular coating of other matter; and Mr. Houel informs us, that this was the only specimen of it which he saw in his travels through Sicily, Malta, and the Lapari Islands. It appears to be the re- mains of some baths, which had been built for the conve- nience of sea-bathing.

RETRADE, in Fortification, a kind of retrenchment made in the body of a bastion or other work, which is to be disputed, inch by inch, after the defences are dismantled. It usually consists of two faces, which form a re-entering angle. When a breach is made in a bastion, the enemy may also make retrade or new fortification behind it.