• (n.) A compound crystal, consisting of three individuals. • (p. pr. & vb. n.) of Trill • (n.) One of tree children born at the same birth. Found on http://thinkexist.com/dictionary/meaning/trilling/
The repeated playing of two notes in rapid succession. This technique can be used as a substitute for sustaining a note in those instruments, such as the piano, which cannot naturally sustain. Found on http://www.bbc.co.uk/radio2/soldonsong/glossary/t.shtml