perisso-, periss- +

(Greek: extraordinary; superfluous, redundant; odd, odd-numbered)

perissodactyl, perissodactylic
1. Having an uneven number of toes or digits on each foot.
2. Any mammal of the order Perissodactyla, comprising the odd-toed hoofed quadrupeds and including the tapirs, rhinoceroses, and horses.
An order of nonruminant ungulate mammals; such as, the horse (with one toe), the tapir, or the rhinoceros (with three toes), that usually have an odd number of toes, molar teeth with transverse ridges on the grinding surface, and posterior premolars resembling true molars.

The middle digit bears the weight of the body. These herbivorous mammals typically have feet encased in a protective horny hoof, lips adapted for plucking, strong cropping incisor teeth, and molars and premolars adapted for chewing.

The stomach is simple and bacterial digestion of cellulose occurs in the cecum, a blind pouch at the junction of the ileum and the colon.

Such herbivores rely on the activity of millions of symbiotic bacteria living in the cecum. These produce enzymes capable of digesting cellulose and releasing simple soluble substances that can be absorbed into the bloodstream.

The condition of being perissodactyl or having an uneven number of toes or digits on each foot
1. Having an odd number of digits on a hand or foot.
2. A reference to the Perissodactyla (a division of ungulate, or hoofed, mammals, including those that have an odd number of toes, as the horse, tapir, and rhinoceros).
perissology (s) (noun), perissologies (pl)
1. The use of more words than are necessary to give meaning or understanding about what is being said; pleonasm: When Greg's mother asked the plumber what went wrong with the water not coming out from the faucets, his perissology confused her so much that she had no idea what he was talking about.
2. Etymology: from Greek, perissologos and from Latin perissologia, "speaking too much".
Verbosity of talking.
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perissoped (s) (noun), perissopeds (pl)
A gifted or talented child: Dr. Thompson told Jill's parents that she was a perissoped, or an exceptionally brilliant girl.
Perissopus dentatus
A parasitic copepod which can be found on the body surface or trailing edges of shark fins.
Having a redundant syllable or syllables.