|a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.|
|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
endocardium en·do·car·di·um (ěn'dō-kär'dē-əm)
n. pl. en·do·car·di·a (-dē-ə)
The thin serous membrane, composed of endothelial and subendothelial tissue, that lines the interior of the heart.