Is onion a taproot?

The main root (primary root) with other minor side roots, which grow deep into the soil is called Taproot. While the fine, thick hairs like structure, that spread sideways in all the directions is called Fibrous or Adventitious root. Taproot arises from the radicle (embryonic part) of the plants, but the Fibrous root grows from the stem and leaves rather from the radicle.

The roots of onion are short-lived and many. These are the characteristics of fibrous roots. So an onion does not have tap root but fibrous roots.