involution

名词 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
   同义词：elaborateness, elaboration, intricacy
4. the act of sharing in the activities of a group
   同义词：engagement, participation, involvement
5. the process of raising a quantity to some assigned power
   同义词：exponentiation
6. the action of enfolding something
   同义词：enfolding

in.vo.lu.tion

n.（名词）

The act of involving.
卷入：卷入的动作
The state of being involved.
被卷：被卷入的状态
Intricacy; complexity.
错综复杂的情形；复杂性
Something, such as a long grammatical construction, that is intricate or complex.
复杂的事物：一个错综复杂或纠缠不清的事物，如一个长长的语法结构
Mathematics The multiplying of a quantity by itself a specified number of times; the raising to a power.
【数学】 乘方：一个数字与自身相乘若干次；达到一个幂
Embryology The ingrowth and curling inward of a group of cells, as in the formation of a gastrula from a blastula.
【胚胎学】 内长：一组细胞的内部或向内生长，如从囊胚到原肠胚的生长过程
Medicine
【医学】
A decrease in size of an organ, as of the uterus following childbirth.
萎缩：一个器官的萎缩，如妇女的子宫在生产后的萎缩
A progressive decline or degeneration of normal physiological functioning occurring as a result of the aging process.
退化：因老化而出现的正常身体功能的持续衰退或退化

来源：
Latin involôtiô involôtiôn-
拉丁语 involôtiô involôtiôn-
from involôtus [past participle of] involvere [to enwrap] * see involve
源自 involôtus [] involvere的过去分词 [包，围绕] *参见 involve

【引伸】
in.volu.tional
adj.（形容词）