Sentence:  Now just as normal perceptions in terms of sense organs different from those stimulated can be interpreted through common past experiences, so it is likely that <WSD>synæsthesias</WSD> may be partly explicable in terms of individual experiences. 
Meaning of the word marked with <WSD> tags:  A neurological or psychological phenomenon whereby a particular sensory stimulus triggers a second kind of sensation. (from late 19th c.)