Adjective

(en adjective)

Capable of being penetrated, entered, or pierced.

* 1867 : , The Five Great Monarchies of the Ancient Eastern World

On the east the high mountain-chain of Zagros, penetrable only in one or two places, forms a barrier of the most marked character, and is beyond a doubt the natural limit for which we are looking.

* 1900 : Arthur M. Mann, The Boer in Peace and War

A Boer may know you, but it will take you some time to know him, and when a certain stage in your acquaintance is reached, you may begin to wonder whether his real nature is penetrable at all.

* 1996 : Peter Carruthers & Peter K. Smith, Theories of Theories of Mind

A capacity is cognitively penetrable in this sense if that capacity is affected by the subject's knowledge or ignorance of the domain.

Adjective

(en adjective)

Of, relating to, consisting of, or resembling a cell or cells.

* {{quote-magazine, year=2012, month=March-April

, author= , title=Well-connected Brains , volume=100, issue=2, page=171 , magazine=(American Scientist) citation , passage=The achievement will transform neuroscience and serve as the starting point for asking questions we could not otherwise have answered, just as having the human genome has made it possible to ask new questions about cellular and molecular systems.}}