precoverとは 意味・読み方・使い方

名詞

precover (複数形 precovers)

1. (mathematics) A generalization of a cover in which the kernal may contain a non-zero pure subgroup.
2. Something that occurs in preparation for a covering.
   • 1957, Canada Dept. of Agriculture Research Station, Kentville, N. S., Research Report, page 19:

     Zineb did not give good control as a precover spray but as a cover spray it gave excellent control of late and storage scab.

   • 1959, Annual Report of the Canadian Plant Disease Survey:

     Excellent control of a storage rot of apples, caused by Gloeosporium album, was obtained with an orchard spraying program of captan in the precover followed by 3 regular and 2 late cover sprays of captan or a mixture of captan and zineb.

   • 2001, Oregon Administrative Rules - Volume 6, page 11:

     At the discretion of the Agent, the permittee may be assessed a reinspection fee, not to exceed $235, when a precover inspection correction notice requires correction of improper construction and, at a subsequent inspection, the Agent finds system construction deficiencies have not been corrected.

語源 2

pre- +‎ discover

動詞

precover (三人称単数 現在形 precovers, 現在分詞 precovering, 過去形および過去分詞形 precovered)

1. (astronomy) To find an older image of an object in archived images after it has been discovered.

関連する語

• precovery