For those wanting to know what the new Snapchat emoji symbols mean, there is several different things that they repersent and these emojis have replaced the âBest Friendsâ feature with Friend Emojis smilies.
(plural tetrads) 1  A group of four things. ( 2 chemistry) A tetravalent atom or radical. ( biology) Two pairs of sister chromatids (a dyad pair) aligned in a certain way and often on the equatorial plane during the meiosis process.
: a group or arrangement of four: asa: a tetravalent element, atom, or radicalb: a group of four cells arranged usually in the form of a tetrahedron and produced by the successive divisions of a mother cell a tetrad of sporesc: a group of four synapsed chromatids that become visibly evident in the pachytene stage of meiotic prophase and are produced ...