Definition: A type of plant structure that develops from a megaspore and is responsible for producing female gametes in certain plants.

Example: The megagametophyte plays a crucial role in the reproductive cycle of heterosporous plants.

Definition: A unit of measurement for frequency that equals one million cycles per second, commonly used in radio and telecommunications.

Example: The radio station broadcasts at a frequency of 100 megahertz.

Definition: A large cell in the bone marrow that produces blood platelets and has a lobed nucleus.

Example: The megakaryocyte is essential for the formation of platelets in the bloodstream.

Definition: Relating to or involving large bone marrow cells that produce platelets, which are important for blood clotting.

Example: The megakaryocytic cells play a crucial role in the formation of blood platelets.

Definition: A type of large red blood cell that has a nucleus and is often found in people with certain blood disorders, particularly those related to vitamin deficiencies.

Example: The doctor noted the presence of megaloblasts in the patient's blood test, indicating a possible vitamin deficiency.

Definition: Relating to a type of large, abnormal red blood cell that is often associated with certain types of anemia.

Example: The doctor diagnosed her with a megaloblastic anemia, which is characterized by the presence of megaloblasts in the blood.

Definition: A unit of measurement used to describe very large distances in space, specifically equal to one million parsecs.

Example: The nearest galaxy is about 0.8 megaparsecs away from us.

Definition: Relating to things that are large enough to be seen with the naked eye, rather than through a microscope.

Example: The megascopic features of the landscape were clearly visible from the hilltop.

Definition: A part of a plant that creates large spores, which are involved in reproduction.

Example: The megasporangium is essential for the development of female gametophytes in certain plants.

Definition: A type of spore that is larger than a microspore and develops into a female gametophyte in certain plants.

Example: In some plants, the megaspore develops into the structure that produces eggs.