pyriform

Core small, pyriform, regular, closed, clasping; Seeds plump, pointed; Flesh yellow, tender, fine-grained, juicy; Flavor acid, rich; Quality very good; Use, table; Season, mid-winter.

From American Pomology Apples by J. A. Warder

Core large, oval or pyriform, regular, closed, clasping; Seeds numerous, angular, plump; Flesh deep yellow, breaking, fine-grained, juicy; Flavor sub-acid, aromatic, rich, sprightly; Quality best; Use, dessert, cooking; Season, December to February.

From American Pomology Apples by J. A. Warder

Sporangium obovoid or pyriform, yellow, stipitate; the wall a thin pellucid membrane, smooth and shining, beautifully iridescent, breaking away above the middle, the lower cup-shaped portion persistent.

From The Myxomycetes of the Miami Valley, Ohio by A. P. (Andrew Price) Morgan

By the left side of the heart of Nautilus, attached to it by a membrane, and hanging loosely in the viscero-pericardial chamber, is the pyriform sac of Owen.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" by Various

This, though variable, is yet generally so far pyriform as to show distinct contraction toward the stipe.

From The North American Slime-Moulds A Descriptive List of All Species of Myxomycetes Hitherto Reported from the Continent of North America, with Notes on Some Extra-Limital Species by Thomas H. (Thomas Huston) MacBride