Unabsorbable a. : Not absorbable; specifically (Physiol.), not capable of absorption; unable to pass by osmosis into the circulating blood; as, the unabsorbable portion of food.

Example:
Do you know why ultrasonic waves can travel undeviated for greater distances and are Unabsorbable by objects?

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Defination from the web:
Unabsorbable in the Online Dictionary. Meaning of Unabsorbable. Pronunciation of Unabsorbable. Translations of Unabsorbable. ... (Physiol.), not capable of absorption; unable to pass by osmosis into the circulating blood; as, the unabsorbable portion of food. ...