Bro's kin (3 letters)

{ Answer }

SIS

{ Related Clues }

Sib
Adele, to Fred
Auntie, to Mom
___ boom bah
Bro's counterpart
Bro's sibling
Certain twin
Cheer starter
Cheer syllable
Emily, to Charlotte
Fam. member
Family girl
Family member
Family nickname
Girl's nickname
Household nickname
Lucy, to Linus
Member of the fam.
Mom's girl
Serena, to Venus
Skipper, to Barbie
Sonny's sib
Sonny's sibling
Spanish ayes
Spanish yeses
Start of a cheer
Family girl, for short
Girl, to her brother
Granny, to a great-aunt
Little girl's nickname

{ Tags }

bah, boom, bros, cheer, counterpart, fam, family, girl, girls, little, member, name, nickname, relative, short, sib, sibling, sis, sonnys, spanish, start

{ Notes }

The answer SIS is seen frequently, appearing about once every 70 puzzles.

{ Definition }

SIS as a noun:

1. (sister, sis) = a female person who has the same parents as another person; "my sister married a musician"

SI as a noun:

1. (Systeme International d'Unites, Systeme International, SI system, SI, International System of Units, International System) = a complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela); "Today the United States is the only country in the world not totally committed to the Systeme International d'Unites"

2. (silicon, Si, atomic number 14) = a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors

3. (ti, te, si) = the syllable naming the seventh (subtonic) note of any musical scale in solmization