Definition. 1  A lumpectomy is a type of surgery used to treat breast cancer. It is considered breast-conserving surgery because in a lumpectomy, only the malignant tumor and a surrounding margin of normal breast tissue are removed. 2  Lumpectomy is a surgical treatment for newly diagnosed breast cancer. It is estimated that at least 50% of women with breast cancer are good candidates for this procedure. The location, size, and type of tumor are of primary importance when considering breast cancer surgery options.
A triadic melody is a melody made up of triads. Triads are chordsconsisting of three tones. The triad consists of the root tone, amajor or minor.
In music, a triad is a set of three notes that can be stacked in thirds. The term harmonic triad was coined by Johannes Lippius in his Synopsis musicae novae (1612). When stacked in thirds, the triad's members, from lowest pitched tone to highest, are called: 1  the root. 2  the third â its interval above the root being a minor third (three semitones) or a major third (four semitones).