Fungal/ˈfʌŋɡl/ Definition 1 of 2Pro Tip 1/3Biological Context The word 'fungal' is often used in biology and ecology to discuss organisms or ecosystems. Fungal diversity is essential for forest ecosystems. Pro Tip 2/3Negative Implications 'Fungal' can imply something is unwelcome or damaging when talking about growth or infection. The walls had a fungal growth that was hard to remove. Pro Tip 3/3Common Misconception Not all fungi are bad. 'Fungal' also relates to beneficial or edible mushrooms. Fungal cultures are used to make delicious blue cheese.