
1) Extant with no use 2) Rudimentary 3) Undeveloped
Found on
https://www.crosswordclues.com/clue/vestigial

1) Undeveloped
Found on
https://www.crosswordclues.com/clue/vestigial

reduced, or very poorly developed
Found on
http://australianmuseum.net.au/Glossary-of-fish-terms

reduced in form and function from the normal or ancestral condition.
Found on
http://en.wikipedia.org/wiki/Glossary_of_botanical_terms

the remaining trace or remnant of an organ which was probably fully developed in some evolutionary predecessor
Found on
http://florabase.dpaw.wa.gov.au/help/glossary

Smaller and of more simple structure than in an evolutionary ancestor (Halliday 1987).
Found on
http://imnh.isu.edu/digitalatlas/bio/glsry.htm

Pertaining to structures or organs that were well developed in an organism's ancestors but have become rudimentary during the course of evolution.
Found on
http://ppathw3.cals.cornell.edu/glossary/Defs_V.htm

• (a.) Of or pertaining to a vestige or remnant; like a vestige.
Found on
http://thinkexist.com/dictionary/meaning/vestigial/

A nonfunctioning structure that is the remnant of an organ or appendage that was once functional in previous generations or earlier stages of development.
Found on
http://www.anbg.gov.au/cpbr/cd-keys/orchidkey/html/glossary.html

Greatly reduced and non-functional.
Found on
http://www.cortland.edu/herp/keys/glossary.htm

Poorly developed, degenerate or atrophied, more fully functional in an earlier stage of development of the individual or species.
Found on
http://www.earthlife.net/insects/glossary.html

Refers to an organ or part (for example, the human appendix) which is greatly reduced from the original ancestral form and is no longer functional. ... (09 Oct 1997) ...
Found on
http://www.encyclo.co.uk/local/20973

Remaining in a species only in a much reduced or useless state. Vestigial body parts or organs are evidence of parts that the ancestors of an animal had, but that the modern animal no longer needs or uses. For example, the rosy boa snake has vestigial traces of the legs of its lizard ancestors.
Found on
http://www.encyclo.co.uk/local/22217

Poorly developed; degenerate; non-functional.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
Ves·tig'i·al adjective Of or pertaining to a vestige or remnant; like a vestige.
Found on
http://www.encyclo.co.uk/webster/V/20

Poorly developed, degenerate or atrophied, more fully functional in an earlier stage of development of the individual or species.
Found on
http://www.geog.ubc.ca/biodiversity/efauna/InsectGlossary.html

Type: Term Pronunciation: ves-tij′ē-ăl Definitions: 1. Relating to a vestige.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=98552

Vestigial: Adjective describing something that is a vestige (remnant) or a primitive structure, and no longer believed to be important. For example, the appendix is considered a vestigial organ, and some infants are born with a vestigial tail.
Found on
http://www.medterms.com/script/main/art.asp?articlekey=11555

reduced, or very poorly developed
Found on
http://www.translationdirectory.com/glossaries/glossary302.php

Describes a structure with little current apparent function that is thought to be present solely because it derives from a structure that was functional in an ancestor.
Found on
https://academy.allaboutbirds.org/bird-academys-a-to-z-glossary-of-bird-ter

a structure (in biology a bodily organ or appendage) that has been reduced to the point where it no longer functions.
Found on
https://www.amentsoc.org/insects/glossary/begins/with/v/
rudimentary adjective not fully developed in mature animals; `rudimentary wings`
Found on
https://www.encyclo.co.uk/local/20974

Remaining in a species only in a much reduced or useless state. Vestigial body parts or organs are evidence of parts that the ancestors of an animal had, but that the modern animal no longer needs or uses. For example, the Rosy Boa bears vestigial traces of the legs of its lizard ancestors.
Found on
https://www.encyclo.co.uk/local/21284

Describes a morphological structure or behaviour pattern that is so reduced through long disuse as to be almost absent.
Found on
https://www.encyclo.co.uk/local/22222

Pertaining to part of an animal that is in the process of being evolutionarily lost and is small, imperfectly formed, and serves no function.
Found on
https://www.encyclo.co.uk/local/23466
No exact match found.