pleonasm
Concise Oxford English Dictionary © 2008 Oxford University Press:
pleonasm /ˈpliːə(ʊ)ˌnaz(ə)m/
▶noun the use of more words than are necessary to convey meaning (e.g. see with one's eyes).
– derivatives
pleonastic adjective,
pleonastically adverb.
pleonastic adjective,
pleonastically adverb.
– origin C16: via late L. from Gk pleonasmos, from pleonazein ‘be superfluous’.
'pleonasm' also found in these Oxford entries:

