Stemming from the Greek word "tokos" meaning childbirth, we have toc-, toco-, tok-, and toko- as combining forms, all referring to labor or childbirth.

The concentration of organic material in source rocks as represented by the weight percent of organic carbon. A value of approximately 0.5% total organic carbon by weight percent is considered the min [..]

word used for the letter T in radio communication, 1898.

A mechanism to be established by each Participating TO and Approved Project Sponsor that will ensure that all Transmission Revenue Credits and other credits specified in Sections 6, 8, and 13 of Appen [..]

See Theory of Constraints

tactical op center

Tactical Operations Center. Usually pronounced ‘tock.’ Where command elements are primarily located. UXO:

Abbreviation for top of cement. This is usually measured from RKB.

See: table of contents.

chemistry - total organic carbon

The TOC (Total Organic Carbon) is one of the most important composite parameters in the assessment of the organic pollution of water. Since it includes all carbon compounds as one mass, it is exactly [..]

It is nothing but Table of Contents indicating a list of all articles published in a journal issue.

NUM so often| so many times

Telephone Operator Centre

Traffic Operations Center, same as TMC.

Tactical Operations Center. Usually pronounced ‘tock.’ Where command elements are primarily located.

Total Organic Carbon. TOC measures the amount of organic carbon in water.

Total Organic Carbon. The total carbon content of particulate and dissolved organic matter in water.

Top of cement

Abbreviation for Top of cement