| 释义 |
in·gres·sion
\ə̇nˈgreshən\ noun
(-s)
Etymology: Middle English, from Latin ingression-, ingressio, from ingressus (past participle) + -ion-, -io -ion
1. : the action of entering : entrance
2. : the process whereby potentialities or eternal objects enter into or become complex actual occasions or events
< the ingression of an object into an event is the way the character of the event shapes itself in virtue of the being of the object — A.N.Whitehead >
3. : inward migration in gastrulation of large yolk-laden macromeres formed by holoblastic but markedly unequal cleavage |