What is the X in X-mas?
sequestration se·ques·tra·tion (sē'kwĭ-strā'shən, sěk'wĭ-)
The formation of a sequestrum.
Loss of blood or of its fluid content into spaces within the body, so that the circulating volume diminishes.
The inhibition or prevention of normal ion behavior by combination with added materials, especially the prevention of metallic ion precipitation from solution.