A European robin, Erithacus rubecula. / An American robin, Turdus migratorius.

(uncountable) The quality of being redolent. / (countable) An evocative fragrance.

plural of cyclic redundancy check

A small passerine bird (Phoenicurus phoenicurus).

(philosophy) In the phenomenology of Edmund Husserl (1859-1938) and his followers, a philosophical procedure intended to reveal the objects of consciousness as pure phenomena independently of any considerations of the existence of those objects and without the influence of inferential knowledge.

Redress of a wrong by the victim; revenge, retribution.

To redress a wrong against oneself; to take revenge.

(Internet) An automatic redirect.

(Britain) The European robin. / Any robin. / (UK, slang, historical) A Bow Street Runner (from the colour of his waistcoat).

Not redundant; not superfluous.