This meaning of "芯" refers to the core or central part of various objects, such as a wick in a candle, the marrow in bones, the staple used in a stapler, the lead in a pencil, the stuffing in cushions, or the pith in plants.

This meaning of "芯" is used to refer to the core, heart, or center of something, symbolizing its most essential or vital part.

This meaning of "芯" specifically refers to the part of a flower's reproductive organ which receives the pollen.

This meaning of "芯" represents another part of a flower's reproductive organ, specifically the male reproductive organ that produces pollen.