The mammary gland is a modified sweat gland that nourishes the young. It consists of the mamma and the teat. Undeveloped in both the male and female at birth, the female mammary gland begins to develop as a secondary sex characteristic at puberty.
gang definition, meaning, what is gang: a group of young people, especially young men, who spend time together, often fightingâ¦. Learn more.
Definition of band for Students. 1  1 : a strip of material that holds together or goes around something else A plastic band held on the container's lid. 2  2 : a strip of something that is different from what it goes around or across a hat band a band of tall grass. 3  3 : a range of frequencies (as of radio waves)