incus
Concise Oxford English Dictionary © 2008 Oxford University Press:
incus /ˈɪŋkəs/
▶noun (pl. incudes /ˈɪŋkjʊdiːz, ɪnˈkjuːdiːz/) Anatomy a small anvil-shaped bone in the middle ear, transmitting vibrations between the malleus and stapes.
– origin C17: from L., lit. ‘anvil’.
'incus' also found in these Oxford entries:

