Between-step

Clearly, the bottle-arms of this "Angel" represent, at one and the same time, the mother's breasts and the father's penis — though we should not forget the between-step of the concept of the mother's penis, [...]

Source: wiktionary

If you find that your next situation on the stepladder is very frightening, then it is obviously too big a step and you should try to think of ways to make it a little easier, as a between step.

Source: wiktionary

I do not know, nor do I care to know, whether they are a sex by themselves, a justified, because helpless, play of Nature; or even a kind of logically essential link, a between-step, as you seem to have persuaded yourself.

Source: wiktionary

Furthermore, in conjunction with various forms of pneumatic interlocking, the whole system fails safe, particularly in not holding a between-step condition.

Source: wiktionary