1. Plural of mycorrhiza; symbiotic associations between fungal hyphae and plant roots in which the fungus aids nutrient absorption and the plant provides carbohydrates.
Usage: technical/scientific; biology

Examples

• Most forest trees depend on mycorrhizas to absorb phosphorus and nitrogen from the soil.
• The mycorrhizas formed between the fungus and the plant roots improved water uptake during drought.
• Scientists study mycorrhizas to understand how plants and fungi cooperate in natural ecosystems.
• Healthy mycorrhizas are essential for the growth of many orchid species.
• Agricultural researchers are exploring how mycorrhizas can reduce the need for chemical fertilizers.