ad-

(From Latin: "to, toward, a direction toward, an addition to, near, at"; and changes to: "ac-, af-, ag-, al-, an-, ap-, aq-, ar-, as-, at-" and ad- is also combined with certain words that begin with the letters c, f, g, l, n, p, q, r, s, and t.)

The Latin element ad carries the idea of "in the direction of" and combines with many Latin words and roots to make common English words.

adsorbate
Something which is absorbed; such as, material gathered on a surface by adsorption.
adsorbent
1. A material that can hold or condense molecules of another substance on its surface by adsorption.
2. Relating to or capable of adsorption.
adsorption
The taking up of the molecules from a gas or liquid on the surface of another substance; distinguished from adsorption, a process where one substance actually penetrates into the inner structure of the other.
adtital
Relating to an organism living immediately below low-tide levels.
adulate (verb), adulates; adulated; adulating
To show excess devotion to someone or to express obsequious admiration by making a big fuss about the person: Sam was overdoing it when he adulated on and on about his supervisor during the business meeting.
To flatter or to over praise.
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adulation (ad yoo LAY shuhn, ad yuh LAY shuhn) (s) (noun), adulations (pl)
1. Excessive flattery, praise, or admiration beyond normal; especially, when done in a servile way: In hopes of getting a substantial raise, Manfred sent his boss a flattering e-mail filled with adulations and an invitation to go for a coffee break together.
2. Abject adoration or great admiration and praise: The critic expressed her adulation and enthusiasm in the local newspaper regarding the dramatic production at the local theater last weekend.
3. Etymology: from Latin adulationem and adulatio, "a fawning; great flattery", a noun of action from aduliari, "to gratify the vanity of"; from ad-, "to" + ulos, "tail".

If you were to imagine a dog wagging its tail to get a treat or to show a lot of friendly behavior, you're thinking is correct. Adulation is considered to be one of the more doglike characteristics of human behavior.

Extravagant praise.
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Hypocritical praise and fawning.
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Excessive praise or flattery.
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adulator (s) (noun), adulators (pl)
A person who uses flattery and clich├ęs or superficial compliments in order to please another person or a group of people: "After an adulator introduced a politician with many complimentary words of praise, the candidate stood up and told the audience that after hearing so many wonderful things about him, he could hardly wait to hear himself start his speech."
adulatory (adjective), more adulatory, most adulatory
Descriptive of a tendency to insincerely praise someone with flattery and being excessively willing to do almost anything to please that person: Often when foreign officials meet, there is a tendency to exchange adulatory comments that are full of platitudes or overused words and insincere praise.
Containing excessive praise.
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adulterer (s) (noun), adulterers (pl)
1. Someone who commits fornication or extramarital relations between partners who are not married to each other.
2. Etymology: from Old French fornication, from Late Latin fornicationem (fornicatio; from fornicari "to fornicate"; from Latin fornix, "brothel"; originally "arch, vaulted chamber"; from fornus "arched or domed shape".

Roman prostitutes commonly solicited customers from under the arches of certain buildings; therefore, fornication means, "intimate relations between an unmarried man and an unmarried woman"; extended in the Bible as adultery.

adumbration
The fact of being darkened or overshadowed.
advance (verb), advances; advanced; advancing
1. To move someone or something forward in position.
2. To put something forward; such as, a proposal.
3. To supply something or part of something; especially, money, before it is due.
4. To rise, or to make or help someone rise, in rank or position.
5. To make something happen earlier than originally expected.
6. Etymology: from Latin abante, "before" which was based on ab-, "from" and ante, "before".
advantage (s) (noun), advantages (pl)
1 A superior or favorable position in relation to someone or something: Henry was hoping to gain an advantage in his negotiations with the company.
2. A circumstance or factor that places a person in a favorable position in relation to another individual or to other people.
3. Etymology: from Old French avant, "before"; from Latin abante, "before".
advection
1. The transfer of a property of the atmosphere; such as, heat, cold, or humidity, by the horizontal movement of an air mass: "Today's temperatures were higher due to the advection of warm air into the region."
2. The rate of change of an atmospheric property caused by the horizontal movement of air.
3. The horizontal movement of water, as in an ocean current.
advection fog
A type of fog formed when warm, moist air moves horizontally over a cold surface and the air is consequently cooled to below its dew point.

This condition is found especially along a coastline where the temperature of land and the temperature of water significantly differ.

advectional invesion
A departure from the usual decrease of temperature with increasing altitude, caused by advection.