Translation

粘液の / 粘液を分泌する / 粘液性の

Meaning

Mucous means related to, producing, or covered with mucus. It is an adjective, most often seen in mucous membrane, mucous layer, and mucous discharge. The learner trap is using mucous as the noun for the substance; that noun is mucus.

Examples

• 口の内側は粘膜で覆われています。
  The inside of the mouth has a mucous membrane.
• 医師は粘液性の分泌物について説明しました。
  The doctor described the mucous discharge.