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“heptadactylisms”
Having seven digits on a hand or a foot: "When a person has heptadactylism, then he or she has seven fingers on one or both hands, instead of the normal five fingers on each hand; and seven toes, instead of the normal five toes on one foot or on both feet."
This entry is located in the following units:
dactylo-, dactyl-, dactylio-, -dactyl, -dactyla, -dactylia, -dactylic, -dactylism, -dactyloid, -dactylous, -dactyly
(page 7)
hepta-, hept-
(page 1)
-ism, -ismus
(page 25)