-The term @emph{ambitus} denotes a range of pitches for a given voice in
-a part of music. It also may denote the pitch range that a musical
-instrument is capable of playing. Most musical instruments have their
-ambitus standardized (or at least there is agreement upon the minimal
-ambitus of a particular type of instrument), such that a composer or
-arranger of a piece of music can easily meet the ambitus constraints of
-the targeted instrument. However, the ambitus of the human voice
-depends on individual physiological state, including education and
-training of the voice. Therefore, a singer potentially has to check for
-each piece of music if the ambitus of that piece meets his individual
-capabilities. This is why the ambitus of a piece may be of particular
-value to vocal performers.
+The term @emph{ambitus} (plural: ambituses) denotes a range of pitches
+for a given voice in a part of music. It also may denote the pitch
+range that a musical instrument is capable of playing. Most musical
+instruments have their ambitus standardized (or at least there is
+agreement upon the minimal ambitus of a particular type of
+instrument), such that a composer or arranger of a piece of music can
+easily meet the ambitus constraints of the targeted instrument.
+However, the ambitus of the human voice depends on individual
+physiological state, including education and training of the voice.
+Therefore, a singer potentially has to check for each piece of music
+if the ambitus of that piece meets his individual capabilities. This
+is why the ambitus of a piece may be of particular value to vocal
+performers.