Definition of Pentact

1. a five-rayed structure in a sponge [n -S]

Lexicographical Neighbors of Pentact

pentacoordinate
pentacosane
pentacosanoic
pentacosanoic acid
pentacosanoyl
pentacosiomedimni
pentacra
pentacrinin
pentacrinite
pentacrinoid
pentacrinoids
pentacrinus
pentacron
pentacrostic
pentacrostics
pentact (current term)
pentacts
pentacube
pentaculum
pentacuspid
pentacyclic
pentad
pentadactyl
pentadactyle
pentadactyloid
pentadactylous
pentadactyly
pentadecagon
pentadecagons
pentadecamer

Literary usage of Pentact

Below you will find example usage of this term as found in modern and/or classical literature:

1. A Student's Text-book of Zoology by Adam Sedgwick, Joseph Jackson Lister, Arthur Everett Shipley (1898)
"... a pentact or hexact in which one ray bears oblique lateral teeth or prickles (Fig. 78, 7). ... The dermal and gastral skeletons contain pentact or ..."

2. Seaside Studies in Natural History by Elizabeth Cabot Cary Agassiz, Alexander Agassiz (1865)
"... under stones at low-water mark, just after they have given up their nomadic habits, and when the limestone pavement begins to be developed. pentact-a. ..."

3. The History of Creation, Or, the Development of the Earth and Its by Ernst Heinrich Philipp August Haeckel, Edwin Ray Lankester (1892)
"... Importance of the Common Ontogenetic Larva-form: pentact ula. THE great natural main groups of the animal kingdom, which we have distinguished as tribes ..."

4. A History of British Star-fishes, and Other Animals of the Class Echinodermata by Edward Forbes (1841)
"2, The pentact^E, which have the suckers arranged in five regular rows, and are more or less angular in form. ..."

5. Geometry of Four Dimensions by Henry Parker Manning (1914)
"... belongs to a terminology in which the name of a figure designates the number of its axes: pentact, a figure with five axes, ..."

6. The Wonders of Life: A Popular Study of Biological Philosophy by Ernst Heinrich Philipp August Haeckel (1904)
"Their historical development is perfectly understood from its earliest stages, since Richard Semon found, in his ingenious pentact ..."

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