antoseros: the name with nothing Greek left in it
heard as antoseros
spelled anthoceros
Two spellings have gone: the th and the c. It is Anthoceros.
What the ear did
This is what the word looks like when it is written purely from sound. Greek theta gives the th of anthos, exactly as in anthology and chrysanthemum, and Greek kappa gives the c that English then says as s.
A-N-T-H-O-C-E-R-O-S
The full entry for anthoceros covers the name itself.