Definition: A thin stalk or projection found in certain fungi that supports the formation of spores.

Example: The sterigma is essential for the reproduction of many types of fungi.

Definition: A hard plate located on the underside of each body segment of an insect or other arthropod.

Example: The sternite provides support and protection for the insect's internal organs.

Definition: The main vertical post located at the back end of a ship, which helps to support the rudder and other structures.

Example: The sternpost is crucial for the stability and steering of the vessel.

Definition: A colorless, flammable, and poisonous gas that is often used as a fumigant.

Example: Stibine is used in some agricultural applications as a fumigant to control pests.

Definition: A chemical element with the symbol Sb, known as antimony, which is used in various alloys and cosmetics.

Example: In ancient times, stibium was commonly used as a cosmetic for enhancing the eyes.

Definition: A gray mineral that is the main source of a chemical element called antimony, often found in shiny crystals or in a solid mass.

Example: The miners extracted stibnite from the earth to use it in various industrial applications.

Definition: An item or material that is added to something to make it more rigid or firm, like a support beam or starch used in clothing.

Example: The tailor used a stiffener to keep the collar of the shirt looking sharp.

Definition: A type of sterol, which is a substance similar to cholesterol, found in plants like soybeans and Calabar beans.

Example: Stigmasterol is often used in dietary supplements for its potential health benefits.

Definition: A colorless or yellowish solid substance used in making dyes and optical brighteners, and also as a phosphor.

Example: Stilbene is commonly used in the production of fluorescent dyes.

Definition: The study of the amounts of substances involved in chemical reactions, focusing on how they relate to each other quantitatively.

Example: In chemistry class, we learned about stoichiometry and how to calculate the amounts of reactants needed for a reaction.