Exam: TOEFL

Definition: A chemical element that is a nonmetal, found in different forms such as powder, glassy, and crystalline. It is used in electronics, photography, and solar technology.

Example: Selenium is an important element in the production of solar panels.

Definition: Relating to or viewed from the center of the moon.

Example: The selenocentric model of the solar system places the moon at its center.

Definition: The scientific study of the moon and its features.

Example: Selenology helps scientists understand the moon's surface and its history.

Definition: The quality or state of having a distinct identity or individuality.

Example: In her journey of self-discovery, she learned the importance of embracing her selfhood.

Definition: In a way that shows concern only for oneself and not for others.

Example: He acted selfishly by taking the last piece of cake without asking anyone else.

Definition: Not thinking about oneself; caring more about others than about oneself.

Example: Her selfless actions inspired everyone in the community.

Definition: In a way that shows concern for others rather than oneself, often putting others' needs before one's own.

Example: She selflessly volunteered to help the community during the crisis.

Definition: The quality of caring more about others than oneself and putting their needs before your own.

Example: Her selflessness was evident when she volunteered to help the homeless every weekend.

Definition: A type of water that is bubbly because it has carbon dioxide gas added to it, making it fizzy and refreshing.

Example: I love to drink seltzer with my meals instead of soda.

Definition: Related to the meaning of words and language.

Example: The semantic meaning of the word can change depending on the context.