quadrigeminal in British English
(ˌkwɒdrɪˈdʒɛmɪnəl) or quadrigeminous (ˌkwɒdrɪˈdʒɛmɪnəs)
adjective1. anatomy obsolete of or relating to a group of four muscles which rotate the thigh laterally
2. anatomy, zoology of or relating to two pairs of protuberances in the tectum of the mammalian midbrain
3. medicine of or relating to cardiac arrhythmia in which heartbeats occur in groups of four