Embryology The change in form or shape caused by the action of one tissue of an embryo on adjacent tissues or parts, as by the diffusion of hormones or chemicals.

• 诱导改变：由于胚胎中一个组织的变化，如荷尔蒙或生化素的扩散，而导致邻近组织或部分产生的形式或形状上的变化