L doses

L dos·es

a group of terms that indicate the relative activity or potency of diphtheria toxin; the L doses are distinctly different from the minimal lethal dose and minimal reacting dose, inasmuch as the latter two represent the direct effects of toxin, whereas the L doses pertain to the combining power of toxin with specific antitoxin.
["L" for L. limes, limit, boundary]

L dos·es

(dōs'ĕz)
A group of terms that indicate the relative activity or potency of diphtheria toxin; the L doses are different from the minimal lethal dose and minimal reacting dose, inasmuch as the latter two represent the direct effects of toxin, whereas the L doses pertain to the combining power of toxin with specific antitoxin.

L dos·es

(dōs'ĕz)
A group of terms that indicate the relative activity or potency of diphtheria toxin; the L doses are different from the minimal lethal dose and minimal reacting dose.