IPA: /ʌnˈkæl.sɪ.faɪd/
KK: /ʌnˈkæl.sɪ.faɪd/
Not having undergone the process of calcification, which means it has not developed hard, mineralized structures.
The uncalcified tissue can be more flexible and softer than calcified tissue.
Uncalcified → It is formed from "un-" (meaning not) and "calcified" (from Latin "calcificare", meaning to make hard or to turn into lime). The word "uncalcified" means not made hard or not turned into lime, referring to a state of being soft or pliable.
Think of 'not' ('un-') being added to 'made hard' ('calcified') — that's why uncalcified means something that is still soft or not hardened.