sectile
adjective
sec·tile ˈsek-tᵊl 
-ˌtī(-ə)l
: capable of being severed by a knife with a smooth cut
amber is a sectile resin
sectility
sek-ˈti-lə-tē
noun 
Word History
Etymology
Latin sectilis, from sectus, past participle of secare
First Known Use
1805, in the meaning defined above