词根词缀：a-, an-

【来源及含义】Greek: prefix; no, absence of, without, lack of; not

【相关描述】These prefixes are normally used with elements of Greek origin, a- is used before consonants and an- is used before vowels.

It affects the meanings of hundreds of words.

There are too many words that use these prefix elements to list all of them on this site; however, there are significant examples listed in this and the other units where they exist.

【同源单词】abacterial, abaptism, abarognosis, abasia, abiocoen, abiogenesis

词根词缀：vascul-, vasculo-

【来源及含义】Latin: a vessel or vessels; including, tubes, ducts, or canals that convey and circulate fluids; such as, blood, lymph, or sap, through the bodies of animals or plants

【相关词根词缀】Inter-related cross references, directly or indirectly, involving "blood" word units: angi-; apheresis; -emia; hemo-; hemoglobin-; phleb-; sangui-; vas-.

【同源单词】algiovascular, avascular, avascular necrosis, avascularity, avascularization, cardiovascular