Elder persons are referred to as Geriatric.
In the Astrix comic, the name of the old man Geriatrix is taken from this.
Every civilization has its way of respecting the elderly for their contribution to family, society and for their wisdom.
In India, the elderly are referred to as Vrddha. This word comes from the Samskrt root vrddh meaning to grow from, increase. The Vrddha are those from whom the civilization has grown forth.
Let us this day and everyday respect the elders for, we are what we are today, due to their selfless effort, love and care in their youth.
We will become Vrddha too one day.