'asplenioid' originates from New Latin, specifically the word 'Asplenium' (the name of a fern genus), combined with the Greek-derived suffix '-oid' (from 'oidēs'), where '-oid' meant 'resembling'.

'Asplenium' comes from Greek 'asplēnion' and entered New Latin as 'Asplenium'; 'asplenioid' was formed in modern botanical English by adding the suffix '-oid' to denote resemblance.

Initially, it meant 'resembling Asplenium,' and over time it has remained specialized botanical usage meaning 'having the form or features of Asplenium.'