Free Vision Screenings for Infants and Toddlers. The early years of life from birth until age five are crucial for a childâs visual development and eye health. The American Optometric Association recognizes how important it is to get your baby's vision off to a good start.
atrium(Noun) An upper chamber of the heart that receives blood from the veins and forces it into a ventricle. In higher vertebrates, the right atrium receives blood from the superior vena cava and inferior vena cava, and the left atrium receives blood from the left and right pulmonary veins.
Meaning: Any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart) Classified under: Nouns denoting body parts. Hypernyms (atrium is a kind of...): chamber (an enclosed volume in the body) Hyponyms (each of the following is a kind of atrium): atrium cordis; atrium of the heart (the upper chamber of each half of the heart)