...The spines meet in a pointon the forehead, and there is no bare patch on the vertex... 
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
...Cuneus: Hymenoptera; the small triangular area at theend of the embolium of hemelytra: Odonata, the small triangle ofthe vertex between the compound eyes...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Facial angle: the angle formed by the junction of theface and vertex...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Frontal fastigium: in Orthoptera, that process of theface extending dorsad between the antennae and meeting or nearlymeeting the fastigium of the vertex in Tettigidae...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Holoptic: Diptera in which the eyes of male arecontiguous between vertex and antennae: see dichoptic...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Lateral foveolae: in Orthoptera: foveate depressions onthe margins of the vertex near the front border of the eye...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Median foveola: in Orthoptera; the foveate depressionof the vertex between the eyes: = central foveola...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Vertical triangle: in male Diptera, the small triangleupon which the ocelli are situated; limited behind by vertex, infront by eyes...
John. B. Smith 「Explanation of Terms Used in Entomology」
...The brightest star will be identified as the vertex of aright-angled triangle, of which the line from Vega to the Pole Star isthe base, as shown in Fig...
Robert Stawell Ball 「The Story of the Heavens」
...This distance from the vertex will be the earth's radius...
George C. Comstock 「A Text-Book of Astronomy」
...,partial shadow—which is shown in by thebroken lines tangent to the sun and moon, and crossing atthe point V, which is the vertex of this cone...
George C. Comstock 「A Text-Book of Astronomy」
...Gemma, sometimes called Alphacca, forms with the stars Seginus andArcturus, in Boötes, an isosceles triangle, the vertex of which is atArcturus...
William Tyler Olcott 「A Field Book of the Stars」
...But special points, like focus or vertex, count as twoordinary ones...
Oliver Lodge 「Pioneers of Science」
...At the foot of the steps in the open air,a loosely built framework of wood ten feet high was standing, displayingon its vertex a yellow disc of paper inscribed with the characters for"voracity...
George Ernest Morrison 「An Australian in China」
...The vertex isorange-coloured, with a black line in the middle...
Phillip Parker King 「Narrative of a Survey of the Intertropical and Western Coasts of Australia] [Volume 2 of 2]」
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