1. a substance containing microorganisms that is introduced into soil or seeds to improve plant growth
Usage: agricultural; scientific
2. a substance used for inoculation, especially a vaccine or serum
Usage: medical

Examples

• The farmer applied a bacterial inoculant to the soybean seeds before planting.
• Rhizobium inoculant helps legumes fix nitrogen from the atmosphere.
• The agricultural extension office recommended using an inoculant for better crop yields.
• Scientists developed a new inoculant to protect against the disease.
• The inoculant contained beneficial bacteria that would colonize the plant roots.
• Proper storage of the inoculant is essential to maintain its effectiveness.