名詞 involution:

1. reduction in size of an organ or part (as in the return of the uterus to normal size after childbirth)
2. a long and intricate and complicated grammatical construction
3. marked by elaborately complex detail
   同義詞：elaborateness, elaboration, intricacy
4. the act of sharing in the activities of a group
   同義詞：engagement, participation, involvement
5. the process of raising a quantity to some assigned power
   同義詞：exponentiation
6. the action of enfolding something
   同義詞：enfolding

in.vo.lu.tion

n.（名詞）

The act of involving.
卷入：卷入的動作
The state of being involved.
被卷：被卷入的狀態(tài)
Intricacy; complexity.
錯綜復雜的情形；復雜性
Something, such as a long grammatical construction, that is intricate or complex.
復雜的事物：一個錯綜復雜或糾纏不清的事物，如一個長長的語法結構
Mathematics The multiplying of a quantity by itself a specified number of times; the raising to a power.
【數(shù)學】 乘方：一個數(shù)字與自身相乘若干次；達到一個冪
Embryology The ingrowth and curling inward of a group of cells, as in the formation of a gastrula from a blastula.
【胚胎學】 內長：一組細胞的內部或向內生長，如從囊胚到原腸胚的生長過程
Medicine
【醫(yī)學】
A decrease in size of an organ, as of the uterus following childbirth.
萎縮：一個器官的萎縮，如婦女的子宮在生產后的萎縮
A progressive decline or degeneration of normal physiological functioning occurring as a result of the aging process.
退化：因老化而出現(xiàn)的正常身體功能的持續(xù)衰退或退化

來源：
Latin involôtiô involôtiôn-
拉丁語 involôtiô involôtiôn-
from involôtus [past participle of] involvere [to enwrap] * see involve
源自 involôtus [] involvere的過去分詞 [包，圍繞] *參見 involve

【引伸】
in.volu.tional
adj.（形容詞）