1902, Arnold Henry Savage Landor, Across Coveted Lands:
The thatched semispherical huts of palm tree leaves and tamarisk were also interesting, as was the windmill, identical with those already seen in Sistan.
1914, Jacob Joshua Levison, Studies of Trees:
The acorns, the largest among the oaks, are semispherical with the cups extremely shallow.
1998 October 30, Anvar A. Zakhidov et al., “Carbon Structures with Three-Dimensional Periodicity at Optical Wavelengths”, in Science, volume 282, number 5390, →DOI, pages 897–901:
Hence, the fracture surface consists of a periodic array of semispherical bowls.