
1) Active 2) Athletic 3) Bending over backward 4) Energetic 5) Flexible 6) French word used in English 7) Gymnastic 8) Like most circus performers 9) Like trapeze artists 10) Like tumblers 11) Limber, and then some 12) Lithe 13) Supple 14) Tumbling 15) Vigorously active 16) Well-balanced 17) With marvelous agility 
Found on 
https://www.crosswordclues.com/clue/acrobatic

• (a.) Pertaining to an acrobat.
Found on 
http://thinkexist.com/dictionary/meaning/acrobatic/
 Ac`ro·bat'ic  adjective
Ac`ro·bat'ic  adjective [ Confer French 
 acrobatique .] Pertaining to an acrobat. -- 
 Ac`ro*bat'ic*al*ly , 
 adverb  Found on 
http://www.encyclo.co.uk/webster/A/22

[
adj] - vigorously active
Found on 
http://www.webdictionary.co.uk/definition.php?query=acrobatic

acrobat, acrobatic 1. A performer on the trapeze, tightrope, etc. who 'walks on tiptoe'; such as, walking on a wire high above the ground.  2. A skilled performer of gymnastic feats; such as, walking on a tightrope or swinging on a trapeze. 3. Etymology: from French acrobate, from Greek akrobates, 'rope dancer, gymnastic performer'; related to akro...
Found on 
http://www.wordinfo.info/words/index/info/view_unit/2372/
 athletic adjective
athletic adjective vigorously active; `an acrobatic dance`; `an athletic child`; `athletic playing`; `gymnastic exercises`
Found on 
https://www.encyclo.co.uk/local/20974

of, pertaining to, or like an acrobat or acrobatics. · having the good balance, agility, and coordination of an acrobat.
Found on 
https://www.infoplease.com/dictionary/acrobatic
  No exact match found.