Resilient

Dictionary.com
/rɪˈzɪlyənt, -ˈzɪliənt/ [ri-zil-yuhnt, -zil-ee-uhnt]

–adjective
1. springing back; rebounding.
2. returning to the original form or position after being bent, compressed, or stretched.
3. recovering readily from illness, depression, adversity, or the like; buoyant.
[Origin: 1635–45; < L resilient- (s. of resiliéns), prp. of resilīre to spring back, equiv. to re- re- + -sil-, comb. form of salīre to leap, jump + -ent- -ent); see salient]

Websters Dictionary
Pronunciation: \-yənt\
Function: adjective
Etymology: Latin resilient-, resiliens, present participle of resilire to jump back, recoil, from re- + salire to leap — more at sally
Date: 1674

: characterized or marked by resilience: as a: capable of withstanding shock without permanent deformation or rupture b: tending to recover from or adjust easily to misfortune or change
synonyms see elastic
— re·sil·ient·ly adverb

Wikipedia:
Resilience is the property of a material to absorb energy when it is deformed elastically and then, upon unloading to have this energy recovered. In other words, it is the maximum energy per volume that can be elastically stored. It is represented by the area under the curve in the elastic region in the Stress-Strain diagram.

Modulus of Resilience, Ur, can be calculated using the following formula: U_r=\frac{\sigma^2}{2E}=0.5\sigma\epsilon=0.5 \sigma(\frac{\sigma}{E}), where σ is yield stress, E is Young's modulus, and ε is strain.

An example of a biomaterial which has a high resilience is articular cartilage, the substance lining the ends of bones in articulating joints such as the knee and hip.