root nodule
Botanical term for the small swellings on the roots of legumes and other plants, formed by nitrogen-fixing bacteria.
Root nodules form on the roots of leguminous plants.
Standard kanji spelling for root nodules.
Alternate kanji spelling using 瘤 (tumor/swelling), also seen in botanical contexts.
Compound of 根 (root) and 粒 (grain, nodule). The alternate form 根瘤 uses 瘤 (swelling, tumor) to emphasize the swollen appearance.