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.
Lemon Tetra. A tetra, like others that needs to be kept in schools of 6 or more. A 10 gallon tank but preferably larger is needed. Paracheirodon innesi. Neon Tetra. Has to be one of the most popular of the tetras. This freshwater fish is a very pretty blue and red and appears iridescent.