elongation

名词 elongation:

1. the quality of being elongated
2. an addition to the length of something
   同义词：extension
3. the act of lengthening something

1. Any of several plant hormones that regulate various functions, including cell elongation.
   植物生长素一种调节多种功能，包括细胞伸长的植物激素

e.lon.ga.tion

n.（名词）
The act of elongating or the condition of being elongated.
拉长：拉长的动作或被拉长的状态
Something that elongates; an extension.
拉长物；延伸物
The angular distance between two celestial bodies as seen from Earth.
距角：从地球上看的两个天体之间的角距离