avid-

1. Marked by an active and keen interest and enthusiasm: "My mother was an avid football fan."
2. Ardently, or excessively, desirous: "I was avid to travel as often as possible."
3. Having an ardent desire or unbounded craving; greedy: "As far back as I can remember, my sister always had an avid desire for books."

1. A protein found in egg white that inactivates the vitamin biotin.
2. A protein found in uncooked egg white that binds to and inactivates biotin. An abundance of avidin in the diet can result in a deficiency of biotin.
3. A protein, found in the white of egg, that combines with and prevents the action of biotin, thus injuring the animal that consumes it in excess by producing biotin deficiency.
4. Etymology: from the mid-20th century. The element avid is used because of its avidity, or affinity, for biotin.

Avid, eager, greedy.

1. A positive feeling of wanting to push ahead with something.
2. Eagerness; intenseness of desire: "He always seems to eat excessively with avidity."
3. Ardent desire, extreme eagerness, greediness.
4. In the field of immunology, the strength of an antigen-antibody binding; a measure of the strength with which an antibody binds to an antigen.
5. Strength of binding, usually of a small molecule with multiple binding sites by a larger one, particularly the binding of a complex antigen by an antibody.

1. In an avid manner; a desire akin to greed, so strong as to be insatiable; such as, he was driven by an avid need for fame and recognition.
2. Greedily, with intense eagerness.

1. A positive feeling of wanting to push ahead with something.
2. Characterized by enthusiasm and vigorous pursuit.