Adjacent, from the Latin adiăcens, is an adjective that is used to name what is located in the vicinity of something. It can therefore be said that what is adjacent is what is next to it. For example: “You were wrong, madam, Dr. López lives in the adjacent house”, “The adjacent field belongs to an Italian millionaire”, “The adjacent premises are empty”.
Sometimes the adjacent acts as something complementary to the main or most important thing. In a mansion or palace, there may be adjacent houses for guests. The adjacent can also serve to mark a delimitation: “The area adjacent to the nuclear plant was evacuated by the authorities at the risk of a toxic leak. ”
In the same way, at a political and geographical level, the term in question is used to refer to a specific type of territory. Specifically, they speak of what are known as adjacent islands.
These are islands that are separated from a continent in question but, despite this physical distance, are part of a specific country and are included within its territory. A clear example of this type of places are the two archipelagos that exist in Spain: the Canary Islands and the Balearic Islands. Thus, both of them, although they are separated from the nation, are part, in all senses, of the Spanish State.
Angles that have one side and the vertex in common, and whose other sides are opposite rays, are known as adjacent angles. Given their characteristics, the adjacent angles are supplementary and consecutive simultaneously since they are equivalent, as a whole, to an angle of the so-called plains (which measure one hundred and eighty degrees).
Some theorists include between the angles adjacent to those that share the vertex and one side, even though they are not supplementary. For others, instead, these are consecutive angles.
Within the denomination of internal adjacent angles, supplementary angles (add 180º), complementary angles (add 90º) and conjugate angles (add 360º) can be mentioned.
In the area of grammar, adjacent is the syntactic constituent belonging to the noun phrase that complements a noun. It is usual that it is a qualifying adjective that can be placed before or after the noun.
However, although we have exposed that fundamentally adjacent ones tend to be qualifying adjectives, we also find others that are adverbs, prepositional constructions, nouns or adjective propositions.
In the same way, we cannot overlook the existence of another use of the adjacent term. Specifically, we are referring to what is known as an adjacent selector. This is a concept that is used in the field of computing and especially the Internet to refer to a mechanism that is used to carry out the selection of two elements that are followed by the HTML code and which are also considered “brothers”.
And all this without forgetting that the field of Medicine also makes use of the concept we are analyzing. Specifically, within this health sector, what is known as “adjacent segment disease” is discussed, which severely affects the spine.