thickening

Definition

The process of making something, or becoming, thick or viscous.

Etymology

From thicken + -ing.

Example Sentences

• "[…] the inner layer (of nearly equally large cells) lacks the regular semiannular or annular thickenings of most other leafy liverworts […]"
• "They disappear at once on slightly relaxing the air-pressure, whilst true incipient thickenings of the surface remain white and unpliably stiff."