invitation noun (ASK TO AN EVENT). A2 [C or U] the âact of âinviting someone to go to an âevent: Thanks for the invitation to âyour âbirthday âparty. I'm âhappy to âaccept âyour invitation. The first âday of the âexhibition will be by invitation (only) (= only those who have been âinvited can come).
fibrodysplasia ossificans progressiva. Description. Fibrodysplasia ossificans progressiva (FOP) is a disorder in which muscle tissue and connective tissue such as tendons and ligaments are gradually replaced by bone (ossified), forming bone outside the skeleton (extra-skeletal or heterotopic bone) that constrains movement.
Fibrodysplasia ossificans progressiva (FOP) is a rare genetic disorder that causes soft tissues to transform permanently into bone. These bones grow abnormally in the muscles, tendons, ligaments and other connective tissues, forming bridges of extra bone across the joints.