1. The injection of a very small amount of a substance (such as DNA, RNA, or a chemical) into a cell or organism using a microscope and a fine needle.
Usage: technical; biology; commonly used in genetic engineering and developmental biology research

Examples

• Scientists used microinjection to insert foreign DNA into the embryo.
• The researcher performed microinjection to study gene expression in individual cells.
• Microinjection allows precise delivery of molecules directly into the nucleus.
• The technique of microinjection has been essential for creating transgenic organisms.
• Under the microscope, the technician carefully performed microinjection into the egg cell.