n.

any communication that encodes a message

"signals from the boat suddenly stopped"

同義詞：signalingsign

any incitement to action

"he awaited the signal to start"; "the victory was a signal for wild celebration"

an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes

Tumor necrosis factor's cytotoxic activity is signaled by the p55 TNF receptor.
Has the QCD critical point been signaled by observations at the BNL relativistic heavy ion collider?
Programmed Cell Death of T Cells Signaled by the T Cell Receptor and the $\alpha_3$ Domain of Class I MHC
Antiviral activity of tumor necrosis factor is signaled through the 55-kDa type I TNF receptor [corrected]
Rho Family GTPase Modification and Dependence on CAAX Motif-signaled Posttranslational Modification
Coreceptor reversal in the thymus: signaled CD4+8+ thymocytes initially terminate CD8 transcription even when differentiating into C...
Induction of wild-type p53, Bax, and acidic endonuclease during somatostatin-signaled apoptosis in MCF-7 human breast cancer cells
Molecular Recognition of Carboxylate Ions Based on the Metal–Ligand Interaction and Signaled through Fluorescence Quenching
Role of the Arabidopsis thaliana NAC transcription factors ANAC019 and ANAC055 in regulating jasmonic acid-signaled defense responses.
The Tomato Homolog of CORONATINE-INSENSITIVE1 Is Required for the Maternal Control of Seed Maturation, Jasmonate-Signaled Defense Re...