It is likely the symbol for the partial derivative, ∂, often used in mathematics to denote differentiation with respect to one variable while treating others as constants.
A b is a backwards d. ..
Adobe Systems
Simple W, A, S, D controls. W = forwards A = left S = backwards D = right
you use a,w,d, and s. a=move <-- d=move --> w=move forward s=move backwards
on your keyboard in between the s and f
(d) is not a symbol used in chemical equations. The symbols (s) represents a solid, (g) represents a gas, and (aq) represents an aqueous solution.
B-o-b b-a-c-k-w-a-r-d-s
if the Jordan symbol is backwards
d - s - mm - b - r.
D & backwards D in logo
Do you mean this symbol ∈ (or backwards 3) if so, it means is an element of; Also, ∉ (with strikethrough) (or backwards 3 with strikethrough) is the symbol for "is not an element of" used in set membership. See also Element (mathematics) and Set (mathematics)
Its called d