summer-tower

Noun

 * 1) movable tower used in sieges
 * 2) * 1408,   tr. Vegetius, De Re Militari (Douce) f. 110
 * Scales, ladderes, & somertoures [L. ad capiendos muros scalae vel machinae] and alle suche gynnes..ben Iordeyned to clymbe vp walles & toures.