reverse shell

[REVERSED-SHELL.] reverse-valve, s. Steam-eng.: A valve in a steam-boiler opening inward to the pre ure of the atmosphere when there is a negative pre ure in the boiler. A vacuum-valve. rě-versed, pa. par. & a. [REVERSE, v. ] A. As pa . par .: (See the verb.) B. As adjective : I. Ordinary Language : 1. Turned in a reverse direction or position; changed to the contrary. 2. Made or declared void; annulled, revoked, upset, as a judgment, decree, . II. Technically: 1. Botany: (1) ( Of an irregular corolla ): Having the upper lip larger and more expanded than the lower one. (2) ( Of a leaf ): Having what is normally the lower side uppermost. 2. Her .: Applied to a coat of arms or escutcheon turned upside down by way of ignominy, as in the case of a traitor.