imperforate

形容词 imperforate:

1. not perforated; having no opening

im.per.fo.rate

adj.（形容词）
Having no opening; not perforated.
不开口的，不穿孔的
Not separated by rows of perforations:
无齿孔的：没有被齿孔行分开的：
例句：
imperforate sheets of stamps.
没有齿孔的邮票

Medicine Lacking a normal opening:
【医学】 闭锁的：缺少一个正常开口的：
例句：
an imperforate anus.
闭锁的肛门

n.（名词）
An imperforate stamp.
无齿孔的邮票