The Collaborative International Dictionary
Semipenniform
Semipenniform \Sem`i*pen"ni*form\ (s[e^]m`[i^]*p[e^]n"n[i^]*f[^o]rm), a. (Anat.) Half or partially penniform; as, a semipenniform muscle.
Wiktionary
semipenniform
a. (context anatomy English) Half or partially penniform.