Noun
The number for which one is obtaining a logarithm. Thus, if a = bᶜ, then c is the logarithm (base b) of a, and a is the logarithmand.
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Let us now understand by an actual logarithm, a symbol of the form log a, in which a is any positive number, while b is any positive number > 1, and which denotes such a positive or negative number or zero, that when the “base” b is potentiated by it, the result will be the “logarithmand” a,—the actual logarithm therefore will always have a value and never more than one, and that value is negative, zero, or positive, according as the logarithmand is 1.
We thus have for ω < Ωₑ, inverting the logarithmand[…]
At small frequency detuning ΔT₂ ≪ 1 and field strength μ₂₁Ɛ₀ ≪ ħT₁⁻¹, the logarithmand may be expanded into a power series.