Words starting with openbr

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openbill — Either of two species of bird in the genus Anastomus of the stork family Ciconiidae, with a distinctive gap between the mandibles of the closed bill.
openbsd — (operating system) A version of BSD Unix with an emphasis on security. A lot of security work that is ported to other free operating systems originates with OpenBSD and a lot of code review is done here. Sub-projects of OpenBSD include implementations of SSH, ntpd, and CVS, to be called OpenCVS.
open chain — a series of atoms linked in a chain not joined together at its ends, and so represented in its structural formula.
open cheque — an uncrossed cheque that can be cashed at the drawee bank
open circuit — a discontinuous circuit through which no current can flow.
open city — a city that, during a war, is officially declared demilitarized and open to occupation, and that will consequently not be defended, in order to spare it, under international law, from bombardment or other military attack.
open classroom — a spacious instructional area shared by several groups or classes in elementary school, permitting more individualized, less supervised project learning and movement of pupils from one activity to another.