Definition: A small capsule or mass containing sperm, produced by some male animals and transferred to females for reproduction.

Example: The male squid released a spermatophore to fertilize the eggs of the female.

Definition: A type of plant that produces seeds, including both flowering plants and conifers.

Example: Spermatophytes are essential for many ecosystems as they provide food and habitat for various animals.

Definition: Relating to male reproductive cells that are involved in fertilization.

Example: The study focused on spermatozoal development in various species.

Definition: A type of male reproductive cell that is capable of movement, typically found in plants and produced in a specific structure called an antheridium.

Example: The spermatozoid swims towards the egg cell to fertilize it.

Definition: A mature male reproductive cell that can fertilize an egg, typically having a head, a neck, and a long tail for movement.

Example: The spermatozoon swims through the female reproductive tract to reach the egg for fertilization.

Definition: Relating to sperm or semen, often used in medical or biological contexts.

Example: The spermic properties of the substance were studied in the laboratory.

Definition: Having the ability to kill sperm, often used in reference to certain contraceptive methods or products.

Example: The spermicidal gel is applied before intercourse to prevent pregnancy.

Definition: A substance that is used to kill sperm, often used as a form of birth control.

Example: She used a spermicide to prevent pregnancy during their intimate moments.

Definition: A type of organic compound that is a polyamine, commonly found in living tissues and involved in cellular functions.

Example: Spermine is important for cellular growth and stability.

Definition: The process by which sperm cells are formed from precursor cells in the male reproductive system.

Example: Spermiogenesis is a crucial step in the development of male gametes.