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.
Please donât take offense! When you have a living child after a loss, there are a ton of people who call this your rainbow baby. Iâve always hated the term. It made no sense to me. In my mind and heart, my living child is no more a rainbow, as the child I lost is a cherub or butterfly for that matter. And though a ton of folks in the babyloss community like to call the child they lost an angel, for me, itâs just plain silly.