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.
Relating to or characteristic of old age. senile. pertaining to old age; manifesting senility. due probably to degeneration of the hair cells in the organ of Corti, and to loss of neurons in the spinal ganglion; called also presbycusis. reduced mineralization of bone due to advanced age. see senile retinopathy.