For units in astronomy, see astronomical system of units. The astronomical unit (symbol au, AU or ua) is a unit of length, roughly the distance from the Earth to the Sun. However, that distance varies as the Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year.
senza. prep. 1. (Classical Music) music without; omitting. [Italian]. 1  Facebook.enza. prep. 1. (Classical Music) music without; omitting. [Italian]. 1  Facebook.
Origin of senescent. Latin sen&emacron;sc&emacron;ns, sen&emacron;scent-, present participle of sen&emacron;scere, to grow old, inchoative of sen&emacron;re, to be old, from senex, sen-, old; see sen- in Indo-European roots. Related Forms: seÂ·nesâ²cence noun.