precava precautiousness • precaval · · · Info · Definitions · Synonyms · Characters · · precava · · Text Latin · · Script 7 · · Length Definitions · · · (noun) receives blood from the head and arms and chest and empties into the right atrium of the heart; formed from the azygos and both brachiocephalic veins. Synonyms: superior vena cava. · · Noun Definition 1 Synonyms · · · superior vena cava · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 p latin small letter p U+0070 r latin small letter r U+0072 v latin small letter v U+0076