precover

plural precovers

1. mathematicsA generalization of a cover in which the kernel may contain a non-zero pure subgroup.
2. Something that occurs in preparation for a covering.

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

   1957, Canada Dept. of Agriculture Research Station, Kentville, N. S., Research Report, page 19

   2 more examples

   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.

   1959, Annual Report of the Canadian Plant Disease Survey

   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.

   2001, Oregon Administrative Rules - Volume 6, page 11

present singular third person precovers · participle present precovering · participle past precovered · past precovered

1. astronomyTo find an older image of an object in archived images after it has been discovered.