apo
apo — abbreviation
1. a special mail system run by the United States military that delivers letters an
a special mail system run by the United States military that delivers letters and packages to soldiers and staff working at military bases overseas
Kian, a US Army medic stationed in South Korea, sent a care package to his cousin through the APO.
prepositional phrase: through + APO
Tara wrote to her husband every week using his APO address.
collocation: APO address
Letters that Sergeant Chen sent through the APO from Japan reached his family in Texas in about ten days.
The soldier gave his family the APO number so they could mail him warm clothes before winter.
- FPO
Fleet Post Office — used by the US Navy and Marine Corps instead of the Army
- military mail
a general term for the postal system serving armed forces
文法句型
APO + address
send through + APO
用法筆記
APO is always written in capital letters. It is used as part of a mailing address for US military personnel stationed abroad, similar to a ZIP code.
常見錯誤
apo — noun
1. a type of protein found in the blood that helps carry fats and cholesterol throu
a type of protein found in the blood that helps carry fats and cholesterol through the body and is used by doctors to assess a patient's risk of heart disease
Dr. Amani reviewed the lab report showing Minh's apo levels, which were higher than the normal range.
collocation: apo levels + higher than normal range
The cardiologist ordered a blood test to check Hannah's apo before starting treatment.
A study of 500 older Brazilians found that high apo levels may indicate greater heart-disease risk.
Diego's doctor explained that the apo test helps measure how well his body processes cholesterol.
- apolipoprotein
the full form of the term; 'apo' is the informal shortened version used in clinical contexts
文法句型
apo + levels
measure + apo
用法筆記
In medical writing, 'apo' is a shortened form of 'apolipoprotein' and is often used in compound terms such as 'apo A-I' and 'apo B' to refer to specific subtypes.
常見錯誤
apo — prefix
1. attached to the beginning of a word to express the idea of moving away from a pl
attached to the beginning of a word to express the idea of moving away from a place, leaving, or being at a distance — for example, apogee (the point farthest from Earth) or apology (originally a speech made to defend oneself from an accusation)
The satellite reached its apogee, the point farthest from Earth in its orbit.
example word: apogee (apo- + gaia = 'away from Earth')
In ancient Greece an apology was a formal speech given to answer charges brought against someone.
In medieval Europe, apostasy was a serious crime that meant abandoning the Christian faith for another religion.
An aphelion is the point in a planet's path where it is furthest away from the sun.
文法句型
apo- + root word
用法筆記
This is the most common meaning of the apo- prefix. It appears in technical terms (apogee, aphelion) and in formal vocabulary (apostasy, apology in its older sense). Learners are most likely to encounter it in astronomy and history texts.
2. attached to the beginning of a word to indicate that something is separated, rem
attached to the beginning of a word to indicate that something is separated, removed, or cut off from something else — for example, apocalypse (an uncovering that separates truth from concealment) or apocryphal (a story whose origin is separate from accepted religious texts)
In ancient Greek texts, the word 'apocalypse' described a revelation that unveils hidden divine truths to humanity.
historical context: ancient Greek meaning of apocalypse
The legend of Prester John is an apocryphal tale whose source lies outside the official records of medieval monarchs.
example word: apocryphal tale (legend with unverified origin)
A strawberry is an apocarpous fruit formed from many separate tiny carpels, unlike a blueberry which has fused ones.
During the office election debate, Tara stayed apolitical and quietly organized the supply closet instead.
- syn-
a Greek prefix meaning 'together' or 'with', as in 'synthesis' or 'synagogue'
文法句型
apo- + root word
用法筆記
This sense of apo- often appears in academic and religious vocabulary. The modern meaning of 'apocalypse' (a great disaster) is a later development; the original Greek sense carries the idea of 'taking the cover off' something.
3. attached to the beginning of a word in chemistry, biology, and medicine to show
attached to the beginning of a word in chemistry, biology, and medicine to show that a substance is formed from, derived from, or closely related to another substance — for example, apolipoprotein (a protein derived from a lipoprotein) or apomorphine (a drug made from morphine)
After a fatty meal, apolipoprotein separates from the larger lipoprotein to help the liver process the fat more efficiently.
collocation: after a fatty meal + apolipoprotein
Apomorphine is a medicine made from morphine through a chemical reaction that removes one water molecule.
An apoenzyme is like a key that needs a cofactor to unlock a chemical reaction in a cell.
Apoferritin is a protein shell that can store iron by binding it inside a hollow cavity.
文法句型
apo- + root word
用法筆記
This sense of apo- is primarily used in scientific writing. In medical lab reports, 'apo' (as a clipping of apolipoprotein) functions as a standalone noun, while in chemistry terms like 'apomorphine' it remains a true prefix attached to the base word.