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Dictionary · Word part

ad-

A word beginning that means toward, near or added to.

ad prefix

What it means

The beginning of words about moving toward or being next to something. Adduction is moving a limb toward the middle of the body, the adrenal glands sit near the kidneys (renal), and an adhesionad-HEE-zhunA band of scar tissue that joins two surfaces inside the body that are normally separate.ad- towardhes stick-ion conditionFull entry is tissue sticking to something. Its opposite is ab-, away from: abduction moves a limb away from the middle. The d often changes to match the next letter, as in "ac-", "af-" or "ap-".

Remember it

ADDuction ADDs the limb to the body.

Related terms

renal

Relating to the kidneys.

adjuvant

Added to a main treatment to help it work better; also a substance added to a vaccine to strengthen the immune response.

adhesion

A band of scar tissue that joins two surfaces inside the body that are normally separate.

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