Exam: TOEFL

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.

Definition: To flow out quickly and in large amounts, often in a forceful way; can also mean to vomit.

Example: The volcano began to spew lava and ash into the sky.

Definition: A substance or material that has been forcefully expelled or emitted, often in a chaotic or uncontrolled manner.

Example: The volcano's spew covered the surrounding area in ash and debris.

Definition: To forcefully send out or eject something in a large amount, often in a stream; it can also mean to vomit.

Example: The volcano began to spew lava and ash into the sky.

Definition: A mineral that contains calcium, titanium, and silicon, often found in small brown or yellow crystals, and sometimes used as a gemstone.

Example: The jeweler showed me a beautiful ring with a sphene stone.

Definition: Relating to a specific bone in the skull that is shaped like a wedge.

Example: The sphenoid bone is located at the base of the skull and helps form the eye socket.

Definition: A bone located at the base of the skull that helps form the eye socket and supports the structure of the face.

Example: The sphenoid bone is crucial for the stability of the skull.

Definition: Having a shape that resembles a wedge, often used in anatomical contexts to describe certain bones or structures in the body.

Example: The sphenoidal bone is located at the base of the skull and is shaped like a wedge.

Definition: A round, three-dimensional shape where every point on the surface is the same distance from the center.

Example: The Earth is not a perfect sphere, but it is very close to one.

Definition: To shape something into a round object or to enclose it within a round area.

Example: The artist decided to sphere the clay into a perfect ball.

Definition: Having the shape of a sphere; round and three-dimensional.

Example: The Earth is not a perfect sphere, but it is close to being spheric.

Definition: A type of bacterial or yeast cell that has lost or has a weak cell wall, making it round in shape and more sensitive to changes in its environment.

Example: The researchers studied the spheroplasts to understand how they respond to different osmotic conditions.

Definition: A circular muscle that controls the opening and closing of a passage in the body.

Example: The sphincter at the end of the digestive tract helps control bowel movements.

Definition: Relating to or resembling a sphincter, which is a muscle that constricts or closes an opening in the body.

Example: The sphincteric muscles help control the flow of urine from the bladder.