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Define the terms imbibition imbibant, imbibate and imbibition pressure.
Answer
Imbibition : It is the process by which colloidal soild particles absorb water and swell without being dissolved.

Imbibant : It is the solid substance which absorbs water and swells up.

Imbibate : It is the liquid or water which is imbibed by the imbibant. 

Imbibition pressure : The imbibant, after imbibition of water or liquid, exerts the pressure which is called imbibition pressure. The germinating seeds have imbibition pressure of about 1000 atmospheres.