What's the difference between levigate and levigated?

Levigate

Definition:

• (a.) Made less harsh or burdensome; alleviated.
• (v. t.) To make smooth in various senses
• (v. t.) To free from grit; to reduce to an impalpable powder or paste.
• (v. t.) To mix thoroughly, as liquids or semiliquids.
• (v. t.) To polish.
• (v. t.) To make smooth in action.
• (v. t.) Technically, to make smooth by rubbing in a moist condition between hard surfaces, as in grinding pigments.
• (a.) Made smooth, as if polished.

Example Sentences:

• (1) 1966.-The isolation of ribosomes from Bacillus subtilis spores was accomplished by freezing the spores in liquid nitrogen and grinding the spore pellet with an equal weight of levigated alumina.

Levigated

Definition:

• (imp. & p. p.) of Levigate

Example Sentences:

• (1) 1966.-The isolation of ribosomes from Bacillus subtilis spores was accomplished by freezing the spores in liquid nitrogen and grinding the spore pellet with an equal weight of levigated alumina.