Yes the answer by Philip is correct in this instance in regard to aircraft interiors, although in aircraft maintenance terminology, it usually refers to a pressure bulkhead, such as either side of the wheel wells, or at either end of the fuselage, such as between the cabin and the tail section.
Rainbow baby. A rainbow baby is a baby that is born following a miscarriage or still birth. In the real world, a beautiful and bright rainbow follows a storm and gives hope of things getting better. The rainbow is more appreciated having just experienced the storm in comparison. The storm (pregnancy loss) has already happened and nothing can change that experience. Storm-clouds might still be overhead as the family continue to cope with the loss, but something colourful and bright has emerged from the darkness and misery.
Here's how you CAN support a family expecting a rainbow baby: 1. Send a rainbow. This new rainbow baby will not erase the pain of the lost baby. But, just like real rainbows, this rainbow baby will bring joy, brightness, and light to a family who's suffered a tragic loss. A rainbow baby blanket, rainbow onesie or rainbow baby carrier will let this family know that you're remembering their lost child while also celebrating the new baby on the way. 2. Say and write the lost baby's name. It is music to our ears to hear someone speak the beautiful name that we chose for our precious child.