SNAIL n.
A tortoise; in ancient warfare, a movable roof or shed to protect besiegers; a testudo. [Obs.] They had also all manner of gynes [engines] . . . that needful is [in] taking or sieging of castle or of city, as snails, that was naught else but hollow pavises and targets, under the which men, when they fought, were heled…
SOW n.
A kind of covered shed, formerly used by besiegers in filling up and passing the ditch of a besieged place, sapping and mining the wall, or the like. Craig. Sow bread. (Bot.) See Cyclamen. -- Sow bug, or Sowbug (Zoöl.), any one of numerous species of terrestrial Isopoda belonging to Oniscus, Porcellio, and allied gene…