heartmembrane
nounUK /ˈhɑːtˌmɛmbreɪn/
US /ˈhɑrtˌmɛmbreɪn/
A thin layer that covers or protects the heart.
The doctor explained that the heartmembrane keeps the heart safe inside the body.
OTHER MEANINGS
2. A figurative barrier around one's emotions.
After the breakup, she built a heartmembrane to keep from getting hurt again.
3. A protective tissue layer in some invertebrate hearts.
The biologist studied the heartmembrane in the insect's circulatory system.
4. A thin film or coating shaped like a heart.
The candy had a shiny heartmembrane of sugar on the outside.