R-colored vowel

R-colored vowel
ɚ
ɝ
ɹ̩
ɻ̍
◌˞
Audio sample
Spectogram of /ə/ and /ɚ/

In phonetics, an r-colored vowel or rhotic vowel is a term describing whether the consonant /ɹ/ is pronounced in "r-dropping" positions, such as at the end of words (e.g., car) or before consonants (e.g., hard).