spirant
noun
spi·rant ˈspī-rənt 
: a consonant (such as \\f\\, \\s\\, \\sh\\) uttered with friction of the breath against some part of the oral passage : fricative
spirant adjective
Word History
Etymology
International Scientific Vocabulary, from Latin spirant-, spirans, present participle of spirare to breathe
First Known Use
1862, in the meaning defined above