- The colorless or milky sap of certain plants, such as the poinsettia or milkweed, that coagulates on exposure to air.
- A polymer emulsion consisting of such sap obtained from rubber trees, used to manufacture various thin elastic products such as balloons, disposable gloves, and medical and contraceptive devices. Some people are allergic to this substance.
- A similar material made from polymers derived from petroleum; synthetic latex.
- Latex paint.
- A milk-like liquid occurring in many plants in special vessels (called <internalXref urlencoded="laticiferous">laticiferous</internalXref>, or sometimes <internalXref urlencoded="cinenchymatous">cinenchymatous</internalXref>), and exuding when the plant is wounded.
- A milky or colored juice in certain plants in cavities (called <ex>latex cells</ex> or <ex>latex tubes</ex>). It contains the peculiar principles of the plants, whether aromatic, bitter, or acid, and in many instances yields caoutchouc upon coagulation. The lattex of the India rubber plant produces the rubber of commerce on coagulation.
- Any aqueous emulsion of finely divided rubber or plastic particles, especially such an emulsion used as a base for paint.
- The milky <xref>sap</xref> of several <xref>trees</xref> that <xref>coagulates</xref> on exposure to air; used to make <xref>rubber</xref>.
- An <xref>emulsion</xref> of rubber in water, used in <xref>adhesives</xref> and the like.
- Natural latex rubber, especially non-<xref>vulcanized</xref> rubber, such as is used in making latex gloves, latex condoms, and latex clothing.
- a water-base paint that has a latex binder
- a milky exudate from certain plants that coagulates on exposure to air