What are the different ways that economists use the word "marginal?"

In the economic context, "marginal" is synonym with "additional." Here are some common uses of the word:

• Marginal costs: additional costs of an action taken by an individual, company or government.
• Marginal benefits: additional benefits of an action taken by an individual, company or government.
• Marginal social costs: additional costs incurred by society for an action taken by an individual, company or government (often used in the context of externalities).
• Marginal social benefits: additional benefits of an action taken by an individual, company or government to society (often used in the context of externalities).
• Marginal utility: additional utility gained from a consumer's additional consumption.
• Marginal opportunity cost: the change in opportunity cost after a change in the production level.
• Marginal propensity to consume: a macroeconomic concept that measures the amount of additional consumption relative to additional income.