Definition: A collection of elements that can be combined using a specific operation, where the combination of any two elements in the set results in another element from the same set, and the operation follows a rule of associativity.

Example: In algebra, a semigroup is often used to study the properties of certain mathematical structures.

Definition: Partially deadly or capable of causing death to some but not all organisms.

Example: The new pesticide is considered semilethal, affecting only a portion of the insect population.

Definition: A type of mutation that causes a significant but not total death rate in organisms, leading to more than half of them dying but not all.

Example: The semilethal mutation affected the population, resulting in a noticeable decline in numbers.

Definition: Having characteristics that are between a liquid and a solid, often able to flow but not completely fluid.

Example: The mixture was semiliquid, making it easy to pour but still thick enough to hold its shape.

Definition: Relating to a type of graph or scale that uses a logarithmic scale for one axis and a linear scale for the other.

Example: The data was plotted on a semilog graph to better visualize the exponential growth.

Definition: Describing a type of graph or scale that uses a logarithmic scale for one axis and a regular arithmetic scale for the other axis.

Example: The scientist used semilogarithmic graph paper to plot the data, making it easier to visualize exponential growth.

Definition: Having the shape of a half-moon or crescent.

Example: The semilunar shape of the arch made the building look elegant.

Definition: A type of element that has some properties of metals and some properties of nonmetals, often used in electronics and other applications.

Example: Arsenic is classified as a semimetal due to its unique properties that are between those of metals and nonmetals.

Definition: Relating to a type of element that has properties of both metals and nonmetals.

Example: Silicon is considered a semimetallic element because it conducts electricity better than nonmetals but not as well as metals.

Definition: Having a strong influence on future developments or ideas; original and creative.

Example: The scientist's seminal research laid the groundwork for many future studies in the field.

Definition: In a way that is original and influential, often leading to new ideas or developments.

Example: The research was seminally important in the field of psychology, paving the way for future studies.