Adjective: vestigial ve'sti-j(ee-)ul
- Surviving as a mere remnant or trace of something that has lost its original purpose or significance
"The handshake emoji remained as a vestigial symbol in the age of social distancing"; "The dress code was a vestigial rule from the company's more formal past"
- (biology) not fully developed in mature animals
"vestigial wings";
- rudimentary
See also: undeveloped
Encyclopedia: Vestigial